Condensed Financial Information of Parent Company - Schedule of Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and due from banks	$ 12,301	$ 30,985
Short-term investments	502,627	639,543
Securities available-for-sale, at fair value	673,453	357,726
Loans, net	948,526	879,732
Payments in advance of funding	291,427	194,563
Premises and equipment, net	18,113	18,057
Other assets	48,452	46,886
Total assets	2,554,901	2,203,235	$ 1,764,243
Liabilities:
Accounts and drafts payable	1,050,396	835,386
Other liabilities	37,204	55,833
Total liabilities	2,309,103	1,942,075
Total shareholders’ equity	245,798	261,160	$ 244,190	$ 229,848
Total liabilities and shareholders’ equity	2,554,901	2,203,235
Parent Company
Assets
Cash and due from banks	132,050	51,714
Short-term investments	585	235,452
Securities available-for-sale, at fair value	566,835	357,726
Loans, net	40,515	49,314
Payments in advance of funding	291,427	194,563
Investments in subsidiaries	164,650	162,341
Premises and equipment, net	17,443	17,459
Other assets	95,940	69,162
Total assets	1,309,445	1,137,731
Liabilities:
Accounts and drafts payable	1,041,070	832,420
Other liabilities	22,577	44,151
Total liabilities	1,063,647	876,571
Total shareholders’ equity	245,798	261,160
Total liabilities and shareholders’ equity	$ 1,309,445	$ 1,137,731