Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Credit Related Financial Instruments

The following table summarizes the outstanding amounts of credit-related financial instruments with off-balance sheet risk:

	At December 31,
(In thousands)	2021		2020
Commitments to extend credit	$	6,870,095	$	6,517,840
Standby letters of credit	224,061		207,201
Commercial letters of credit	58,175		30,522
Total credit-related financial instruments with off-balance sheet risk	$	7,152,331	$	6,755,563

Unfunded Commitments, Allowance For Credit Loss

The following table summarizes the activity in the ACL on unfunded loan commitments:

	Years ended December 31,
(In thousands)	2021		2020		2019
Balance, beginning of period	$	12,755	$	2,367	$	2,506
Adoption of CECL	—		9,139		—
Provision (benefit)	349		1,249		(139)
Balance, end of period	$	13,104	$	12,755	$	2,367