Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Total
Balances at Dec. 31, 2020	$ 39	$ 134,629	$ 2,003,576	$ (368,074)	$ (32,889)	$ (23,496)	$ 1,713,785
Net income	0	0		21,451	0	0	21,451
Stock-based compensation expense	0	0	483	0	0	0	483
Common stock and Series B Preferred stock dividends declared	0	0	0	(4,826)	0	0	(4,826)
Common stock issued for 401(k) match	0	42	1,088	0	0	0	1,130
Other comprehensive income	0	0	0	0	1,832	0	1,832
Common stock issued to pension plans	0	875	15,925	0	0	0	16,800
Balances at Mar. 31, 2021	39	135,546	2,021,072	(351,449)	(31,057)	(23,496)	1,750,655
Balances at Dec. 31, 2021	39	136,391	2,034,485	(353,651)	(28,456)	(28,021)	1,760,787
Net income	0	0		4,153	0	0	4,153
Stock-based compensation expense	0	0	1,271	0	0	0	1,271
Incentive compensation units distributed	0	222	(222)	0	0	(1,921)	(1,921)
Common stock and Series B Preferred stock dividends declared	0	0	0	(3,509)	0	0	(3,509)
Common stock issued for 401(k) match	0	44	883	0	0	0	927
Other comprehensive income	0	0	0	0	(33,165)	0	(33,165)
Balances at Mar. 31, 2022	$ 39	$ 136,657	$ 2,036,417	$ (353,007)	$ (61,621)	$ (29,942)	$ 1,728,543