CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period at Dec. 31, 2020	$ 2,079,231	$ 110,705	$ 42,094	$ 1,062,083	$ 791,630	$ 72,719
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(13,245)				52,814	(66,059)
Cash dividends declared:
Preferred	(2,013)				(2,013)
Common	(9,260)				(9,260)
Issuance of shares of common stock	(1,266)		80	(1,346)
Stock based compensation	2,760			2,760
Balance at end of period at Mar. 31, 2021	2,056,207	110,705	42,174	1,063,497	833,171	6,660
Balance at beginning of period at Dec. 31, 2021	2,182,178	110,705	42,275	1,071,956	962,994	(5,752)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(238,080)				43,089	(281,169)
Cash dividends declared:
Preferred	(2,013)				(2,013)
Common	(11,415)				(11,415)
Issuance of shares of common stock	(1,517)		95	(1,612)
Stock based compensation	2,704			2,704
Balance at end of period at Mar. 31, 2022	$ 1,931,857	$ 110,705	$ 42,370	$ 1,073,048	$ 992,655	$ (286,921)