Exit Activities (Detail) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2016
Predecessor [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated	10		53
Severance and Termination Benefits	$ 400	$ 700
Liabilities Subject to Compromise, Early Contract Termination Fees		400
Payments for Restructuring		500
Restructuring Reserve, Accretion of Obligation		$ 175
Successor [Member]
Restructuring Cost and Reserve [Line Items]
Severance and Termination Adjustment	100
Restructuring Reserve, Accretion of Obligation	$ 0