PARENT COMPANY ONLY FINANCIAL INFORMATION (Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets:
Cash and interest bearing deposits	$ 363,087	$ 435,599
Other assets	496,008	246,923
TOTAL ASSETS	20,244,228	19,274,549
Liabilities and Stockholders’ equity:
Other borrowings	371,753	372,072
Accrued expenses and other liabilities	248,294	171,447
TOTAL LIABILITIES	18,509,173	17,092,371
Stockholders’ equity:
Common stock	42,467	42,275
Capital surplus	1,080,964	1,071,956
Retained earnings	1,120,925	962,994
Accumulated other comprehensive loss	(620,006)	(5,752)
TOTAL STOCKHOLDERS' EQUITY	1,735,055	2,182,178	$ 2,079,231	$ 1,578,137
TOTAL LIABILITIES AND EQUITY	20,244,228	19,274,549
Parent
Assets:
Cash and interest bearing deposits	307,026	259,830
Investment in subsidiaries	1,747,188	2,263,037
Other assets	94,953	81,020
TOTAL ASSETS	2,149,167	2,603,887
Liabilities and Stockholders’ equity:
Other borrowings	370,930	369,581
Accrued expenses and other liabilities	43,182	52,128
TOTAL LIABILITIES	414,112	421,709
Stockholders’ equity:
Preferred stock	110,705	110,705
Common stock	42,467	42,275
Capital surplus	1,080,964	1,071,956
Retained earnings	1,120,925	962,994
Accumulated other comprehensive loss	(620,006)	(5,752)
TOTAL STOCKHOLDERS' EQUITY	1,735,055	2,182,178
TOTAL LIABILITIES AND EQUITY	$ 2,149,167	$ 2,603,887