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Commitments and Contingencies Commitments and Contingencies (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016	$ 3,441
2017	3,056
2018	2,521
2019	2,155
2020	303
Thereafter	586
Total future minimum lease payments	12,062
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016	842
2017	817
2018	771
2019	779
2020	803
Thereafter	7,818
Total future minimum lease payments	11,830
Less: amount representing interest (rates ranging from 7.0% to 11.5%)	(5,145)
Less: current portion of obligations under capital leases	(324)	$ (246)
Long-term obligations under capital leases	$ 6,361	$ 2,630
Capital Lease Obligations | Minimum
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Future Minimum Lease Payments Interest Rate	7.00%
Capital Lease Obligations | Maximum
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Future Minimum Lease Payments Interest Rate	11.50%

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Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

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Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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