Stockholders' Equity - Changes in Accumulated Other Comprehensive Loss, Net of Tax, by Component (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 352,316	$ 370,375	$ 357,102	$ 372,944
Other comprehensive (loss) income before reclassifications	(3,442)	66	(5,322)	(1,854)
Amounts reclassified from accumulated other comprehensive loss	302	389	540	353
Net current period other comprehensive income (loss)	(3,140)	455	(4,782)	(1,501)
Ending Balance	348,537	375,515	348,537	375,515
ASU 2018-02 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	385	385	385	385
Ending Balance	385	385	385	385
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(13,556)	(13,595)	(11,914)	(11,639)
Ending Balance	(16,696)	(13,140)	(16,696)	(13,140)
Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,276)	(160)	(552)	32
Other comprehensive (loss) income before reclassifications	(589)	(272)	(1,564)	(329)
Amounts reclassified from accumulated other comprehensive loss	389	177	640	42
Net current period other comprehensive income (loss)	(200)	(95)	(924)	(287)
Ending Balance	(1,476)	(255)	(1,476)	(255)
Defined Benefit Plan Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(5,626)	(9,522)	(5,613)	(9,621)
Amounts reclassified from accumulated other comprehensive loss	(87)	212	(100)	311
Net current period other comprehensive income (loss)	(87)	212	(100)	311
Ending Balance	(5,713)	(9,310)	(5,713)	(9,310)
Foreign Currency Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(7,039)	(4,298)	(6,134)	(2,435)
Other comprehensive (loss) income before reclassifications	(2,853)	338	(3,758)	(1,525)
Net current period other comprehensive income (loss)	(2,853)	338	(3,758)	(1,525)
Ending Balance	$ (9,892)	$ (3,960)	$ (9,892)	$ (3,960)