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STOCK-BASED COMPENSATION (PREDECESSOR COMPANY) - Restricted Stock Units (Details) - Predecessor - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2014
Sep. 30, 2014
Grant date fair values      
Expenses recorded for stock-based compensation plans   $ 25,900  
Total compensation cost related to non-vested stock-based compensation not yet recognized   $ 27,000  
Additional equity compensation plan information      
Number of securities to be issued upon exercise of outstanding options, warrants and rights (in shares)   2,154,679  
Weighted-average exercise price of outstanding options, warrants and rights (in dollars per share)   $ 22.07  
Number of remaining securities available for future issuance under equity compensation plans, excluding securities to be issued upon exercise of outstanding options, warrants and rights (in shares)   4,092,546  
Equity compensation plans approved by shareowners      
Additional equity compensation plan information      
Number of securities to be issued upon exercise of outstanding options, warrants and rights (in shares)   1,960,959  
Weighted-average exercise price of outstanding options, warrants and rights (in dollars per share)   $ 22.07  
Number of remaining securities available for future issuance under equity compensation plans, excluding securities to be issued upon exercise of outstanding options, warrants and rights (in shares)   4,092,546  
Equity compensation plans not approved by shareowners      
Additional equity compensation plan information      
Number of securities to be issued upon exercise of outstanding options, warrants and rights (in shares)   193,720  
Deferred compensation plan for officers | Equity compensation plans approved by shareowners      
Additional equity compensation plan information      
Number of securities to be issued upon exercise of outstanding options, warrants and rights (in shares)   475,386  
Deferred compensation plan for officers | Equity compensation plans not approved by shareowners      
Additional equity compensation plan information      
Number of securities to be issued upon exercise of outstanding options, warrants and rights (in shares)   41,011  
Deferred compensation plan for directors who are not employees | Equity compensation plans approved by shareowners      
Additional equity compensation plan information      
Number of securities to be issued upon exercise of outstanding options, warrants and rights (in shares)   162,429  
Deferred compensation plan for directors who are not employees | Equity compensation plans not approved by shareowners      
Additional equity compensation plan information      
Number of securities to be issued upon exercise of outstanding options, warrants and rights (in shares)   152,709  
Performance Shares      
Grant date fair values      
Awards issued (in shares)   203,295  
Fair values of awards at grant date   $ 10,484  
Additional equity compensation plan information      
Number of shares of common stock assumed to be payable with respect to each outstanding award (in shares)   1  
Performance Shares | Equity compensation plans approved by shareowners      
Additional equity compensation plan information      
Number of securities to be issued upon exercise of outstanding options, warrants and rights (in shares)     907,487
Stock Appreciation Rights      
Grant date fair values      
Awards issued (in shares)   0  
Vesting period 5 years    
Stock Appreciation Rights | Equity compensation plans approved by shareowners      
Additional equity compensation plan information      
Number of securities to be issued upon exercise of outstanding options, warrants and rights (in shares)   102,458  
Number of shares of common stock assumed to be payable with respect to each outstanding award (in shares)   1  
Restricted Stock Units      
Grant date fair values      
Awards issued (in shares)   98,700  
Fair values of awards at grant date   $ 5,100  
Restricted Stock Units | Equity compensation plans approved by shareowners      
Additional equity compensation plan information      
Number of securities to be issued upon exercise of outstanding options, warrants and rights (in shares)   313,199  
Restricted Stock Units | Vesting after three years from grant date      
Grant date fair values      
Percentage of awards vesting   50.00%  
Vesting period   3 years  
Restricted Stock Units | Vesting after four years from grant date      
Grant date fair values      
Percentage of awards vesting   50.00%  
Vesting period   4 years