Operating Segments and Related Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) segment	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Operating Segments and Related Information
Number of reportable segments | segment	3
Number of operating segments | segment	3
Goodwill	$ 317,873		$ 317,873
Total Assets	12,567,509		12,859,689
Net interest income	70,056	$ 64,893
Noninterest income	35,772	31,445
Noninterest expense	70,376	54,499
Income before income taxes	35,705	48,635
Net income	28,439	37,816
Operating segments | Banking
Operating Segments and Related Information
Goodwill	294,773		294,773
Total Assets	12,450,999		12,746,833
Net interest income	73,832	68,455
Noninterest income	15,286	12,884
Noninterest expense	55,567	42,091
Income before income taxes	33,804	46,044
Net income	26,451	35,528
Operating segments | FirsTech
Operating Segments and Related Information
Goodwill	8,992		8,992
Total Assets	46,900		47,481
Net interest income	18	20
Noninterest income	5,419	4,861
Noninterest expense	4,683	4,290
Income before income taxes	754	591
Net income	550	429
Operating segments | Wealth Management
Operating Segments and Related Information
Goodwill	14,108		14,108
Total Assets	71,364		65,587
Noninterest income	15,776	12,587
Noninterest expense	8,265	6,565
Income before income taxes	7,511	6,022
Net income	5,840	4,682
Other
Operating Segments and Related Information
Total Assets	(1,754)		$ (212)
Net interest income	(3,794)	(3,582)
Noninterest income	(709)	1,113
Noninterest expense	1,861	1,553
Income before income taxes	(6,364)	(4,022)
Net income	$ (4,402)	$ (2,823)