Summary of Significant Accounting Policies (Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, tax effect	$ (121)	$ 1,978	$ 271
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(807,877)	(841,553)	(659,687)	$ (685,016)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(16,073)	(15,723)	(21,074)	$ (21,808)
Net unrealized gains on investment securities available for sale, net of income taxes of $7, $21, and $160, respectively
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, tax effect	7	21	160
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	7	46	422
Pension-related amounts, net of income taxes of $5,799, $5,692, and $7,809, respectively
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, tax effect	(5,799)	(5,692)	(7,809)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (16,080)	$ (15,769)	$ (21,496)