Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Jan. 01, 2022	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans	$ 54,113	$ 53,456	$ 52,803	$ 51,891	$ 50,583		$ 62,689
Allowance for credit losses on debt securities available for sale	0	0	0	0	0		0
Off-balance sheet, credit loss, liability	5,810	6,330	6,970	6,611	8,358		524
Stockholders' equity attributable to parent	1,007,431	1,022,788	1,053,595	1,029,645	1,074,284		1,079,081
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity attributable to parent	$ 887,035	877,905	857,518	$ 835,627	814,708		765,133
Effect of adopting ASU No. 2016-13 ("CECL")
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans							(16,443)
Allowance for credit losses on debt securities available for sale		$ 0	$ 0		$ 0		490
Off-balance sheet, credit loss, liability							7,674
Stockholders' equity attributable to parent							6,212
Effect of adopting ASU No. 2016-13 ("CECL") | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity attributable to parent							$ 6,212
ASU 2016-13 | Effect of adopting ASU No. 2016-13 ("CECL")
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans						$ (12,100)
Allowance for credit losses on debt securities available for sale						353
Off-balance sheet, credit loss, liability						5,500
ASU 2016-13 | Effect of adopting ASU No. 2016-13 ("CECL") | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity attributable to parent						$ 6,200