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Pension Benefits - Recognized in AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Pension Benefits
Amortization of transition obligation	$ 41	$ 41
Actuarial gain (loss)	(1,910)	416
Totals	(1,869)	457
Amounts in accumulated other comprehensive loss not yet reflected in net periodic pension cost, net of taxes:
Actuarial gain (loss)	(163)	1,747
Transition obligation	(50)	(91)
Totals	(213)	$ 1,656
Amounts in accumulated other comprehensive loss expected to be amortized in 2020 net periodic pension cost, net of taxes:
Actuarial gain	1
Transition obligation	38
Total	$ 39

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