Derivative Financial Instruments (Offsetting Derivatives) (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Asset Derivatives, Fair Value, Less: Master netting agreements	$ 5,977	$ 6,364
Asset derivatives	47,388	133,481
Liability Derivatives, Fair Value, Less: Master netting agreements	5,977	6,364
Liability derivatives	110,443	13,301
Hedge Accounting Positions
Derivative [Line Items]
Asset Derivatives, Fair Value	62,877	25,636
Asset Derivatives, Fair Value, Less: Master netting agreements	60,183	25,636
Asset derivatives	2,694	0
Liability Derivatives, Fair Value	6,881	8,483
Liability Derivatives, Fair Value, Less: Master netting agreements	6,881	8,483
Liability derivatives	0	0
Asset derivatives, amounts not offset	(3,060)	51
Asset derivatives, net amounts	(366)	51
Liability derivatives, amounts not offset	1,014	428
Liability derivatives, net amounts	$ 1,014	$ 428