Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY - Components of Stock-Based Compensation (Details)

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STOCKHOLDERS' EQUITY - Components of Stock-Based Compensation (Details) - Time lapse restricted stock - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Pre-tax compensation expense $ 3,093 $ 3,267
Tax benefit (786) (1,264)
Restricted stock expense, net of tax $ 2,307 $ 2,003