PARENT COMPANY ONLY FINANCIAL INFORMATION - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets
Equity securities	$ 11,535	$ 13,571
Investments in subsidiaries:
Premises and equipment, net	126,524	136,147
Other assets	398,792	204,242
Total assets	12,336,677	12,859,689
Liabilities:
Short-term borrowings	351,054	17,678
Long-term debt	30,000	46,056
Senior notes, net of unamortized issuance costs	0	39,944
Subordinated notes, net of unamortized issuance costs	222,038	182,773
Junior subordinated debentures owed to unconsolidated trusts	71,810	71,635
Other liabilities	201,717	133,184
Total liabilities	11,190,700	11,540,577
Total stockholders’ equity	1,145,977	1,319,112	$ 1,270,069	$ 1,220,434
Total liabilities and stockholders’ equity	12,336,677	12,859,689
Parent Company
Assets
Cash and cash equivalents	91,812	78,217
Equity securities	11,535	13,571
Investments in subsidiaries:
Bank	1,369,261	1,565,226
Non-bank	2,181	2,812
Premises and equipment, net	18	30
Other assets	22,316	22,444
Total assets	1,497,123	1,682,300
Liabilities:
Short-term borrowings	12,000	12,000
Long-term debt	30,000	42,000
Senior notes, net of unamortized issuance costs	0	39,944
Subordinated notes, net of unamortized issuance costs	222,038	182,773
Junior subordinated debentures owed to unconsolidated trusts	71,810	71,635
Other liabilities	15,298	14,836
Total liabilities	351,146	363,188
Total stockholders’ equity	1,145,977	1,319,112
Total liabilities and stockholders’ equity	$ 1,497,123	$ 1,682,300