Income Taxes Income Taxes Table (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2016	Jun. 30, 2018	Jun. 30, 2017
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ (855)	$ (2,785)		$ (1,348)	$ (2,961)
Income tax expense	190	1,255		444	1,524
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	822	2,522	$ 1,354		2,878
Unrecognized Tax Benefits, Period Increase (Decrease)	60	160		130	372
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	67	22		133	35
Effective Income Tax Rate Reconciliation, Deduction, Other, Amount	62	101		123	200
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation and Amortization, Amount	24	1,062		46	1,099
Effective Income Tax Rate Reconciliation, Tax Contingency, Foreign, Amount	(39)	45		(54)	(94)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	$ 49	$ 128		$ 60	$ (5)