Revenue Recognition and Accounts Receivable - Schedule of Net Impact of Adoption to Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current assets
Cash, cash equivalents, and restricted cash			$ 70,403
Accounts receivable, net	$ 72,423		86,805
Inventories	84,635		82,397
Prepaid expenses and other current assets	16,500		20,948
Total current assets	270,379		260,553
Deferred income taxes	25,042		35,117
Other long-term assets			199,950
Total assets	525,861		495,620
Liabilities and shareholders’ equity
Total liabilities	168,997		167,989
Shareholders’ equity
Common shares	1,942		1,902
Additional paid-in capital	292,291		271,019
Retained earnings	59,379		57,749
Accumulated other comprehensive loss	3,252		(3,039)
Total shareholders’ equity	356,864		327,631	$ 335,397	$ 296,608
Total liabilities and shareholders’ equity	$ 525,861		495,620
ASU 2016-13 [Member]
Current assets
Cash, cash equivalents, and restricted cash		$ 70,403
Accounts receivable, net		85,685
Inventories		82,397
Prepaid expenses and other current assets		20,948
Total current assets		259,433
Deferred income taxes		35,350
Other long-term assets		199,950
Total assets		494,733
Liabilities and shareholders’ equity
Total liabilities		167,989
Shareholders’ equity
Common shares		1,902
Additional paid-in capital		271,019
Retained earnings		56,862
Accumulated other comprehensive loss		(3,039)
Total shareholders’ equity		326,744
Total liabilities and shareholders’ equity		$ 494,733
ASU 2016-13 [Member] | Impact of Adoption of ASC 326 [Member]
Current assets
Accounts receivable, net			(1,120)
Total current assets			(1,120)
Deferred income taxes			233
Total assets			(887)
Shareholders’ equity
Retained earnings			(887)
Total shareholders’ equity			(887)
Total liabilities and shareholders’ equity			$ (887)