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Changes in Accumulated Other Comprehensive Loss - Reclassification of Adjustments out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Equity [Abstract]
Amortization of Prior Service Costs	$ (4)	$ (90)	$ (8)	$ (181)
Recognized Net Actuarial Loss	59	354	122	708
Total	55	264	114	527
Less: Tax Benefit	14	94	29	188
Net of Tax	$ 41	$ 170	$ 85	$ 339

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