| INCOME TAXES - Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
| Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | |
| Current Taxes: | ||||
| Federal | $ 15,032 | $ 14,251 | $ 38,141 | $ 33,678 | 
| State | 1,883 | 2,109 | 5,848 | 3,860 | 
| Total | $ 16,915 | $ 16,360 | $ 43,989 | $ 37,538 | 
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- References No definition available. 
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- Definition Amount of current and deferred federal income tax expense (benefit) attributable to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of state and local current and deferred income tax expense (benefit) attributable to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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