Other Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Other Liabilities
Interest rate swap liability	$ 0	$ 894
Other	707	758
Total	10,546	11,691
Derivative asset, noncurrent	962
Pension plan
Other Liabilities
Pension and supplemental executive retirement plan liability	2,202	2,280
SERP
Other Liabilities
Pension and supplemental executive retirement plan liability	$ 7,637	$ 7,759

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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