Compensation Plans - Changes in OCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	$ 1,078,975	$ 867,185	$ 603,804
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(18,343)	19,371	27,031
Debt Securities, Held-to-maturity, Transfer, Derivative Hedge, Gain (Loss)		0	0
Balance	1,529,116	1,078,975	867,185
Accumulated other comprehensive income (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	37,120	17,749	(9,282)
Balance	18,777	37,120	17,749
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	22,320	14,977	(9,047)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(17,049)	23,627	29,226
Debt Securities, Held-to-maturity, Transfer, Derivative Hedge, Gain (Loss)		(16,284)	(5,202)
Balance	5,271	22,320	14,977
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(4,508)	(2,162)	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	2,330	(2,346)	(2,162)
Debt Securities, Held-to-maturity, Transfer, Derivative Hedge, Gain (Loss)		0	0
Balance	(2,178)	(4,508)	(2,162)
AOCI, Accumulated Gain (Loss), Held To Maturity Securities, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	19,308	4,934	(235)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(3,624)	(1,910)	(33)
Debt Securities, Held-to-maturity, Transfer, Derivative Hedge, Gain (Loss)		16,284	5,202
Balance	$ 15,684	$ 19,308	$ 4,934