Reclassifications Out of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,143,319
Total amount reclassified from accumulated other comprehensive loss, net of tax, into net income	(764)	$ (1,200)	$ 101
Unrealized gains on available-for-sale securities (Note 20)	0	0	2
Foreign currency translation adjustments	99,868	(12,400)	29,468
Balance at end of period	1,367,012	1,143,319
Accumulated defined benefit plans adjustment attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(11,390)	(42,652)	(50,335)
Tax expense	(10,095)	(9,579)	(1,514)
Total other comprehensive gain before reclassifications, net of tax	30,773	29,470	7,140
Tax benefit	(608)	(648)	(185)
Total amount reclassified from accumulated other comprehensive loss, net of tax, into net income	1,801	1,792	543
Foreign currency translation adjustments	32,574	31,262	7,683
Balance at end of period	21,184	(11,390)	(42,652)
Accumulated defined benefit plans adjustment, net prior service attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Amounts reclassified from Accumulated other comprehensive loss	650	(42)	(84)
Accumulated defined benefit plans adjustment, net gain (loss) attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Unrecognized net actuarial gains	40,868	39,049	8,654
Amounts reclassified from Accumulated other comprehensive loss	1,759	2,482	812
Accumulated net investment gain (loss) attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	0	0	(2)
Unrealized gains on available-for-sale securities (Note 20)	0	0	2
Balance at end of period	0	0	0
Accumulated foreign currency adjustment attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(130,259)	(86,597)	(108,380)
Total amount reclassified from accumulated other comprehensive loss, net of tax, into net income	(764)	(1,200)	101
Foreign currency translation adjustments	68,273	(42,462)	21,682
Balance at end of period	(62,750)	(130,259)	(86,597)
Accumulated foreign currency forward cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	0	0	0
Unrealized losses on cash flow hedges (Note 19)	(215)	0	0
Balance at end of period	$ (215)	$ 0	$ 0