Income Taxes Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current tax:
Federal									$ (183)	$ (81)	$ (219)
State									586	146	(95)
Foreign									967	978	1,189
Current Income Tax Expense (Benefit)									1,370	1,043	875
Deferred taxes:
Federal									0	(5,417)	(12,500)
State									537	143	902
Foreign									1	28	(9)
Deferred Income Tax Expense (Benefit)									538	(5,246)	(11,607)
Income tax expense (benefit)	$ 611	$ 258	$ (249)	$ 1,288	$ (5,403)	$ 17	$ 1,135	$ 48	$ 1,908	$ (4,203)	$ (10,732)