Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 15, 2016	Dec. 31, 2018	Dec. 31, 2017
Noncash investing and financing activities:
Cash paid for reorganization items	$ 0		$ 0	$ 0
Cash paid for interest	1,312		32,718	30,397
Cash paid for taxes	0		40	0
Income tax refund	$ 0		$ 1,097	$ 0
Predecessor [Member]
Noncash investing and financing activities:
Cash paid for reorganization items		$ 6,955
Cash paid for interest		69,134
Cash paid for taxes		57
Income tax refund		$ 1,834