The Company and Its Significant Accounting Policies - Schedule of Correction of Prior Period Financial Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Inventories	$ 125,813	$ 96,338
Property and equipment, net	98,762	103,474
Total assets	1,458,001	1,478,929
Deferred tax liabilities	11,652	15,601
Total liabilities	676,690	652,914
Accumulated other comprehensive loss	8,138	(24,575)
Retained earnings	402,544	417,889
Total shareholders' equity	$ 781,311	826,015	$ 822,902	$ 788,689
As Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Inventories		99,075
Property and equipment, net		103,304
Total assets		1,481,496
Deferred tax liabilities		16,351
Total liabilities		653,664
Accumulated other comprehensive loss		(24,694)
Retained earnings		419,825
Total shareholders' equity		827,832
Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Inventories		(2,737)
Property and equipment, net		170
Total assets		(2,567)
Deferred tax liabilities		(750)
Total liabilities		(750)
Accumulated other comprehensive loss		119
Retained earnings		(1,936)
Total shareholders' equity		$ (1,817)