Prior Periods Financial Statement Revision - Schedule of Revision on Changes in Stockholders' Equity (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)
Accumulated other comprehensive income (loss)	(15,564)	(24,804)				(15,564)			(29,808)	(21,992)	4,657
Additional paid-in capital	288,903					288,903			284,508	277,917
Total stockholders' equity	$ 311,813	323,491				$ 311,813			310,513	312,020	172,989
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)
Accumulated other comprehensive income (loss)		(20,416)							(25,122)	(19,153)	5,367
Additional paid-in capital										277,582
Total stockholders' equity		327,879							315,199	313,881	173,699
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)
Accumulated other comprehensive income (loss)		(4,388)							(4,686)	(2,839)	(710)
Additional paid-in capital										335
Total stockholders' equity		$ (4,388)							$ (4,686)	$ (1,861)	$ (710)