Goodwill and Other Intangible Assets, Summary of Core Deposit and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Summary of core deposit intangibles and other intangibles
Other intangible amortization	$ 2,203	$ 2,236
Core Deposit Intangibles
Summary of core deposit intangibles and other intangibles
Gross carrying amount at the beginning of period			$ 88,109	$ 88,109
Accumulated amortization	(32,219)		(30,016)
Net book value	55,890		58,093
Other intangible amortization	2,203		8,811
Other Intangibles
Summary of core deposit intangibles and other intangibles
Gross carrying amount at the beginning of period			0	$ 2,000
Accumulated amortization	0		(683)
Net book value	0		0
Other intangible amortization	0		33
Other Intangibles | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Summary of core deposit intangibles and other intangibles
Reductions due to sale	$ 0		$ (1,317)