Financial Derivatives and Hedging Activities - Fair Value Amounts Recorded as Component of Accumulated Other Comprehensive Income (Loss) Before Taxes (Detail) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Balance at January 1,	$ (3,460)	$ 5,859
Deferred gains on cash flow hedges	4,117	1,103
Reclassified to earnings	14	(3,670)
Balance at June 30,	$ 671	$ 3,292

Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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