STOCK-BASED COMPENSATION (PREDECESSOR COMPANY) - Performance Shares and Stock Appreciation Rights (Details) - Predecessor $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016 installment	Dec. 31, 2014 USD ($) award $ / shares shares
Stock-based compensation
Performance shares award issued		203,295
Performance awards
Stock-based compensation
Period over which ROE is calculated		3 years
Minimum percentage of the company's ROE to earn awards under 2014 performance awards		10.50%
Number of awards earned when ROE is below specified floor percentage | award		0
Minimum percentage of Company's ROE to earn maximum awards under 2014 performance awards		12.00%
Number of shares of common stock assumed to be payable with respect to each outstanding award		1
Performance shares award issued		203,295
Estimated fair value of performance shares issued | $		$ 10,484
Stock Appreciation Rights
Stock-based compensation
Performance shares award issued		0
Exercisable period of grants from grant date	5 years
Expiration period from date of grant	10 years
Weighted-Average Base Price Per Share
Weighted-Average Base Price Per Share (in dollars per share) | $ / shares		$ 30.41
No. of SARs
Number of SARS (in shares)		157,628
Expected Volatility Rate		69.40%
Risk Free Interest Rate		2.60%
Expected Dividend Rate		2.40%
Expected Forfeiture Rate		0.00%
Stock Appreciation Rights | Minimum
Stock-based compensation
Number of annual installments to exercise stock appreciation rights | installment	3
Stock Appreciation Rights | Maximum
Stock-based compensation
Number of annual installments to exercise stock appreciation rights | installment	4