Parent-only Financial Information - Statement of Financial Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and due from banks	$ 70,702	$ 422,787
Short-term investments	261	170
Total cash and cash equivalents	70,963	422,957
Equity securities, at fair value	2,710	5,418
Other assets	249,615	209,852
Total assets	9,224,097	8,798,536
Liabilities:
Balance	377,309	799,364
Accrued expenses and other liabilities	161,020	176,691
Total liabilities	8,145,016	7,787,249
Stockholders' equity	1,079,081	1,011,287	$ 982,517	$ 972,060
Total liabilities and stockholders' equity	9,224,097	8,798,536
Parent Company
Assets
Cash and due from banks	77,077	94,053
Short-term investments	261	170
Total cash and cash equivalents	77,338	94,223
Equity securities, at fair value	216	1,167
Investment in subsidiaries	981,922	873,629
Loans receivable, net	39,862	41,461
Other assets	15,608	9,803
Total assets	1,114,946	1,020,283
Liabilities:
Balance	36,815	6,953
Accrued expenses and other liabilities	2,301	2,043
Total liabilities	39,116	8,996
Stockholders' equity	1,075,830	1,011,287
Total liabilities and stockholders' equity	$ 1,114,946	$ 1,020,283