Accumulated Other Comprehensive Income (Loss) - Amounts Reclassified to Net Income from Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pre-tax amount	$ 19,144	$ 16,369
Tax (provision) benefit	5,226	4,682
Reclassification of gain (loss) to net income	13,918	11,687
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification of gain (loss) to net income	946	(482)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gain (Loss) on Cash Flow Hedging Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax (provision) benefit	(28)	(10)
Reclassification of gain (loss) to net income	898	(511)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Actuarial Gain (Loss) Related to Pension Liability [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax (provision) benefit	3	3
Reclassification of gain (loss) to net income	26	24
Reclassification out of Accumulated Other Comprehensive Income [Member] | Revenues [Member] | Gain (Loss) on Cash Flow Hedging Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pre-tax amount	926	(501)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Other Income (Expense), Net [Member] | Actuarial Gain (Loss) Related to Pension Liability [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pre-tax amount	23	21
Reclassification out of Accumulated Other Comprehensive Income [Member] | Other Income (Expense), Net [Member] | Gain (Loss) on Postretirement Obligation [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification of gain (loss) to net income	$ 22	$ 5