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)	121,174				170,343	(49,169)
Cash dividends declared:
Preferred	(6,038)				(6,038)
Common	(29,101)				(29,101)
Issuance of shares of common stock	254		156	98
Stock based compensation	6,732			6,732
Balance at end of period at Sep. 30, 2021	2,172,252	110,705	42,250	1,068,913	926,834	23,550
Balance at beginning of period at Jun. 30, 2021	2,159,786	110,705	42,245	1,066,765	883,484	56,587
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	22,887				55,924	(33,037)
Cash dividends declared:
Preferred	(2,013)				(2,013)
Common	(10,561)				(10,561)
Issuance of shares of common stock	197		5	192
Stock based compensation	1,956			1,956
Balance at end of period at Sep. 30, 2021	2,172,252	110,705	42,250	1,068,913	926,834	23,550
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)	(493,358)				151,526	(644,884)
Cash dividends declared:
Preferred	(6,038)				(6,038)
Common	(34,314)				(34,314)
Issuance of shares of common stock	79		169	(90)
Stock based compensation	7,411			7,411
Balance at end of period at Sep. 30, 2022	1,655,958	110,705	42,444	1,079,277	1,074,168	(650,636)
Balance at beginning of period at Jun. 30, 2022	1,774,068	110,705	42,439	1,076,766	1,031,076	(486,918)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(107,154)				56,564	(163,718)
Cash dividends declared:
Preferred	(2,013)				(2,013)
Common	(11,459)				(11,459)
Issuance of shares of common stock	195		5	190
Stock based compensation	2,321			2,321
Balance at end of period at Sep. 30, 2022	$ 1,655,958	$ 110,705	$ 42,444	$ 1,079,277	$ 1,074,168	$ (650,636)