Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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-URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
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-Section 55
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Goodwill and Other Intangibles - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Mar. 28, 2022	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill And Other Intangible Assets [Line Items]
Goodwill		$ 182,225	$ 174,518	$ 180,867
Branch acquisition	$ 7,700	7,707
Sale of component of business segment			(6,349)
Commercial Banking [Member]
Goodwill And Other Intangible Assets [Line Items]
Goodwill		63,113	59,419	59,419
Branch acquisition		3,694
Institutional Banking [Member]
Goodwill And Other Intangible Assets [Line Items]
Goodwill		51,332	51,332	51,332
Personal Banking [Member]
Goodwill And Other Intangible Assets [Line Items]
Goodwill		67,780	63,767	$ 70,116
Branch acquisition		$ 4,013
Sale of component of business segment			$ (6,349)