Annual report pursuant to Section 13 and 15(d)

INCOME TAXES (Details)

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INCOME TAXES (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Current:      
Federal $ 48,505,000 $ 40,250,000 $ 39,636,000
State 7,723,000 8,494,000 6,802,000
Foreign 3,373,000 2,724,000 3,324,000
Benefit from valuation allowance releases     (7,889,000)
Deferred:      
Federal 191,000 2,355,000 (143,000)
State 528,000 625,000 626,000
Foreign 65,000 (905,000) (49,000)
TOTAL PROVISION FOR INCOME TAXES 60,385,000 53,543,000 42,307,000
Reconciliation of primary factors causing income tax expense to be different than the federal statutory rate      
Income tax at statutory rate 56,384,000 50,241,000 44,202,000
State income tax expense (net of federal benefit) 5,477,000 4,688,000 4,873,000
Foreign tax expense (benefit) (2,109,000) (1,804,000) 301,000
Valuation allowance     (7,889,000)
Other 633,000 418,000 820,000
TOTAL PROVISION FOR INCOME TAXES 60,385,000 53,543,000 42,307,000
Effective income tax rate (as a percent) 37.50% 37.30% 33.50%
State and federal income taxes receivable 6,300,000 12,000,000  
Income taxes paid net of refunds $ 51,983,000 $ 60,101,000 $ 46,431,000