EARNINGS PER SHARE (PREDECESSOR COMPANY) (Details) - Predecessor - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2015	Dec. 31, 2014
Calculation of basic earnings per share:
Net income	$ 1,509	$ 384,875
Average shares issued and outstanding (in shares)	79,343,253	78,970,229
Issuable under various deferred compensation plans (in shares)	1,109,595	1,094,988
Weighted shares outstanding - basic (in shares)	80,452,848	80,065,217
Per share:
Net income - basic (in dollars per share)	$ 0.02	$ 4.81
Calculation of diluted earnings per share:
Net income	$ 1,509	$ 384,875
Weighted shares outstanding - basic (in shares)	80,452,848	80,065,217
Stock appreciation rights ("SARs") (in shares)	64,570	272,196
Issuable under various other stock-based compensation plans (in shares)	935,382	768,656
Restricted stock units (in shares)	306,487	269,427
Weighted shares outstanding - diluted (in shares)	81,759,287	81,375,496
Per share:
Net income - diluted (in dollars per share)	$ 0.02	$ 4.73