STOCKHOLDERS' EQUITY (Details) - Time Lapse Restricted Shares and Restricted Stock Units - USD ($) $ in Thousands  | 
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2017  | 
Sep. 30, 2016  | 
Sep. 30, 2017  | 
Sep. 30, 2016  | 
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| Time lapse restricted stock: | ||||
| Pre-tax compensation expense | $ 3,031 | $ 3,049 | $ 9,406 | $ 9,429 | 
| Tax benefit | (1,173) | (1,180) | (3,640) | (3,649) | 
| Restricted stock expense, net of tax | $ 1,858 | $ 1,869 | $ 5,766 | $ 5,780 | 
| X | ||||||||||
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. No definition available. 
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- References No definition available. 
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
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