Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Combined Federal And State Income Tax Rate	23.00%	23.00%
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (5,644)	$ (7,012)
Other comprehensive income before reclassifications	(6,306)	5,186
Amounts reclassified from other comprehensive loss	125	(2,819)
Other Comprehensive Income (Loss), Net of Tax	(6,181)	2,367	$ (3,180)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0	0
Ending balance	(14,482)	(5,644)	(7,012)
Defined Benefit Pension Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(5,033)	(4,660)
Other comprehensive income before reclassifications	(963)	528
Amounts reclassified from other comprehensive loss	125	0
Other Comprehensive Income (Loss), Net of Tax	(838)	528
Ending balance	(5,871)	(5,033)	(4,660)
Unrealized Gains (Losses) on Securities Available-for-Sale
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(611)	(2,352)
Other comprehensive income before reclassifications	(5,343)	4,658
Amounts reclassified from other comprehensive loss	0	(2,819)
Other Comprehensive Income (Loss), Net of Tax	(5,343)	1,839
Ending balance	(8,611)	(611)	(2,352)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax	(6,181)	2,367	$ (3,180)
Accounting Standards Update 2016-01 [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	2,657
Accounting Standards Update 2016-01 [Member] | Defined Benefit Pension Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0
Accounting Standards Update 2016-01 [Member] | Unrealized Gains (Losses) on Securities Available-for-Sale
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(2,657)
Accounting Standards Update 2016-01 [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ (2,657)
Accounting Standards Update 2018-02 [Domain] | Defined Benefit Pension Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		(901)
Accounting Standards Update 2018-02 [Domain] | Unrealized Gains (Losses) on Securities Available-for-Sale
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		(98)
Accounting Standards Update 2018-02 [Domain] | Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		$ (999)