Prior Periods Financial Statement Revision - Schedule of Revision on Condensed Consolidated Statements of Comprehensive Income (Loss) (Detail) - USD ($) $ 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]
Net income (loss)	$ (21,529)	$ 7,407	$ 4,455	$ 2,119	$ (1,358)	$ (14,122)	$ 760	$ 5,215	$ 7,299	$ (6,788)	$ 8,217
Change in fair value of interest rate hedge			2,244	416	(635)		(219)	2,025	1,910	(1,637)	(273)
Foreign currency translation gain (loss)	9,240	5,004	(378)	(5,071)	7,223	14,244	2,152	1,774	(9,727)	(25,011)	(18,599)
Other comprehensive income (loss)	9,240	5,004	1,866	(4,655)	6,588	14,244	1,933	3,799	(7,817)	(26,648)	(18,872)
Comprehensive income (loss)	$ (12,289)	12,411	6,321	(2,536)	5,230	$ 122	2,693	9,014	(518)	(33,436)	(10,655)
As Previously Reported [Member]
Accounting Changes And Error Corrections [Line Items]
Net income (loss)		7,407	4,147	2,031	(1,299)		732	4,879	7,942	(7,431)	8,217
Change in fair value of interest rate hedge			4,211	(79)	(1,002)		(1,081)	3,130	3,015	(2,584)	(431)
Foreign currency translation gain (loss)		4,706	382	(2,925)	6,719		3,794	4,176	(8,984)	(21,936)	(17,731)
Other comprehensive income (loss)		4,706	4,593	(3,004)	5,717		2,713	7,306	(5,969)	(24,520)	(18,162)
Comprehensive income (loss)		12,113	8,740	(973)	4,418		3,445	12,185	1,973	(31,951)	(9,945)
Adjustment [Member]
Accounting Changes And Error Corrections [Line Items]
Net income (loss)			308	88	(59)		28	336	(643)	643
Change in fair value of interest rate hedge			(1,967)	495	367		862	(1,105)	(1,105)	947	158
Foreign currency translation gain (loss)		298	(760)	(2,146)	504		(1,642)	(2,402)	(743)	(3,075)	(868)
Other comprehensive income (loss)		298	(2,727)	(1,651)	871		(780)	(3,507)	(1,848)	(2,128)	(710)
Comprehensive income (loss)		$ 298	$ (2,419)	$ (1,563)	$ 812		$ (752)	$ (3,171)	$ (2,491)	$ (1,485)	$ (710)