Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE OF FINANCIAL INSTRUMENTS (Details)

v2.4.1.9
FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Line of Credit [Member]    
Short-term Debt [Line Items]    
Line of credit maximum borrowing capacity $ 175,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LineOfCreditMember
 
Outstanding borrowings 0us-gaap_LineOfCredit
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LineOfCreditMember
0us-gaap_LineOfCredit
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LineOfCreditMember
Letter of Credit [Member]    
Short-term Debt [Line Items]    
Line of credit maximum borrowing capacity 75,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LetterOfCreditMember
 
Swingline Credit Facility [Member]    
Short-term Debt [Line Items]    
Line of credit maximum borrowing capacity $ 25,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_ShortTermDebtTypeAxis
= rol_SwinglineCreditFacilityMember