Prior Periods Financial Statement Revision - Schedule of Revision on Condensed Consolidated Statements of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended					6 Months Ended		9 Months Ended	12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Changes And Error Corrections [Line Items]
Selling, general and administrative expense	$ 23,036		$ 18,347	$ 20,993	$ 20,802	$ 44,530	$ 41,795	$ 60,142	$ 80,229	$ 51,782
Income (loss) from operations	20,593		18,727	17,302	11,784	42,751	29,086	47,813	59,437	26,760
Write-off of unamortized debt issuance costs						8,054			2,589	19,173
Interest expense	12,409		15,871	16,631		27,365	33,053	48,924
Income (loss) before provision (benefit) for income taxes and share of net income from joint venture	(32,201)		(3,237)	1,495	(3,509)	(24,187)	(2,014)	(5,251)	(6,772)	(23,487)
Provision (benefit) for income taxes	(9,428)		(6,265)	719	(751)	(7,128)	(31)	(6,296)	(8,133)	(11,698)
Net income (loss)	$ (21,529)	$ 7,407	$ 4,455	$ 2,119	$ (1,358)	$ (14,122)	$ 760	$ 5,215	$ 7,299	$ (6,788)	$ 8,217
Basic net income (loss) per share	$ (0.78)		$ 0.16	$ 0.08	$ (0.05)	$ (0.52)	$ 0.03	$ 0.19	$ 0.27	$ (0.32)
Diluted net income (loss) per share	$ (0.78)		$ 0.16	$ 0.08	$ (0.05)	$ (0.52)	$ 0.03	$ 0.19	$ 0.27	$ (0.32)
As Previously Reported [Member]
Accounting Changes And Error Corrections [Line Items]
Selling, general and administrative expense			$ 18,347	$ 21,592	$ 20,712		$ 42,304	$ 60,651	$ 80,266	$ 51,745
Income (loss) from operations			18,727	16,703	11,874		28,577	47,304	59,400	26,797
Write-off of unamortized debt issuance costs									3,089	18,673
Interest expense			16,337	16,165			32,587	48,924
Income (loss) before provision (benefit) for income taxes and share of net income from joint venture			(3,703)	1,362	(3,419)		(2,057)	(5,760)	(7,309)	(22,950)
Provision (benefit) for income taxes			(6,423)	674	(720)		(46)	(6,469)	(9,313)	(10,518)
Net income (loss)		$ 7,407	$ 4,147	$ 2,031	$ (1,299)		$ 732	$ 4,879	$ 7,942	$ (7,431)	$ 8,217
Basic net income (loss) per share			$ 0.15	$ 0.08	$ (0.05)		$ 0.03	$ 0.18	$ 0.29	$ (0.35)
Diluted net income (loss) per share			$ 0.15	$ 0.07	$ (0.05)		$ 0.03	$ 0.18	$ 0.29	$ (0.35)
Adjustment [Member]
Accounting Changes And Error Corrections [Line Items]
Selling, general and administrative expense				$ (599)	$ 90		$ (509)	$ (509)	$ (37)	$ 37
Income (loss) from operations				599	(90)		509	509	37	(37)
Write-off of unamortized debt issuance costs									(500)	500
Interest expense			$ (466)	466			466
Income (loss) before provision (benefit) for income taxes and share of net income from joint venture			466	133	(90)		43	509	537	(537)
Provision (benefit) for income taxes			158	45	(31)		15	173	1,180	(1,180)
Net income (loss)			$ 308	$ 88	$ (59)		$ 28	$ 336	$ (643)	$ 643
Basic net income (loss) per share			$ 0.01					$ 0.01	$ (0.02)	$ 0.03
Diluted net income (loss) per share			$ 0.01	$ 0.01				$ 0.01	$ (0.02)	$ 0.03