Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3)

v2.4.0.6
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Reconciliation of weighted average shares outstanding along with the earnings per share attributable to restricted shares of common stock (participating securities)                      
Net Income $ 22,914 $ 32,211 $ 33,127 $ 23,080 $ 21,595 $ 29,415 $ 31,061 $ 18,640 $ 111,332 $ 100,711 $ 90,002
Less: Dividends paid                 (64,282) (41,110) (35,521)
Undistributed earnings for the period                 47,050 59,601 54,481
Allocation of undistributed earnings:                      
Undistributed earnings                 47,050 59,601 54,481
Basic shares outstanding:                      
Basic shares outstanding                 146,299 146,882 148,030
Diluted shares outstanding                      
Basic shares outstanding                 146,299 146,882 148,030
Weighted average participating shares outstanding - assuming dilution (in shares)                 146,306 146,946 148,231
Basic earnings per share                      
Distributed earnings basic (in dollars per share)                 $ 0.44 $ 0.28 $ 0.24
Undistributed earnings basic (in dollars per share)                 $ 0.32 $ 0.41 $ 0.37
Total shares of common stock, basic (in dollars per share) $ 0.16 $ 0.22 $ 0.23 $ 0.16 $ 0.15 $ 0.20 $ 0.21 $ 0.13 $ 0.76 $ 0.69 $ 0.61
Diluted earning per share:                      
Distributed earnings diluted (in dollars per share)                 $ 0.44 $ 0.28 $ 0.24
Undistributed earnings diluted (in dollars per share)                 $ 0.32 $ 0.41 $ 0.37
Total shares of common stock, diluted (in dollars per share) $ 0.16 $ 0.22 $ 0.23 $ 0.16 $ 0.15 $ 0.20 $ 0.21 $ 0.13 $ 0.76 $ 0.69 $ 0.61
Common Stock
                      
Reconciliation of weighted average shares outstanding along with the earnings per share attributable to restricted shares of common stock (participating securities)                      
Less: Dividends paid                 (63,120) (40,383) (34,871)
Undistributed earnings for the period                 46,150 58,497 53,419
Allocation of undistributed earnings:                      
Undistributed earnings                 46,150 58,497 53,419
Diluted allocation of undistributed earnings                 46,150 58,498 53,421
Basic shares outstanding:                      
Basic shares outstanding                 143,499 144,162 145,145
Diluted shares outstanding                      
Basic shares outstanding                 143,499 144,162 145,145
Dilutive effect of stock options (in shares)                 7 64 201
Weighted average participating shares outstanding - assuming dilution (in shares)                 143,506 144,226 145,346
Basic earnings per share                      
Distributed earnings basic (in dollars per share)                 $ 0.44 $ 0.28 $ 0.24
Undistributed earnings basic (in dollars per share)                 $ 0.32 $ 0.41 $ 0.37
Total shares of common stock, basic (in dollars per share)                 $ 0.76 $ 0.69 $ 0.61
Diluted earning per share:                      
Distributed earnings diluted (in dollars per share)                 $ 0.44 $ 0.28 $ 0.24
Undistributed earnings diluted (in dollars per share)                 $ 0.32 $ 0.41 $ 0.37
Total shares of common stock, diluted (in dollars per share)                 $ 0.76 $ 0.69 $ 0.61
Restricted shares of common stock
                      
Reconciliation of weighted average shares outstanding along with the earnings per share attributable to restricted shares of common stock (participating securities)                      
Less: Dividends paid                 (1,162) (727) (650)
Undistributed earnings for the period                 900 1,104 1,062
Allocation of undistributed earnings:                      
Undistributed earnings                 900 1,104 1,062
Diluted allocation of undistributed earnings                 $ 900 $ 1,103 $ 1,060
Basic shares outstanding:                      
Basic shares outstanding                 2,800 2,720 2,885
Diluted shares outstanding                      
Basic shares outstanding                 2,800 2,720 2,885
Basic earnings per share                      
Distributed earnings basic (in dollars per share)                 $ 0.42 $ 0.27 $ 0.23
Undistributed earnings basic (in dollars per share)                 $ 0.32 $ 0.41 $ 0.37
Total shares of common stock, basic (in dollars per share)                 $ 0.74 $ 0.68 $ 0.60
Diluted earning per share:                      
Distributed earnings diluted (in dollars per share)                 $ 0.42 $ 0.27 $ 0.23
Undistributed earnings diluted (in dollars per share)                 $ 0.32 $ 0.41 $ 0.37
Total shares of common stock, diluted (in dollars per share)                 $ 0.74 $ 0.68 $ 0.60