Income Taxes Income Tax Disclosure (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Effective Income Tax Rate, Continuing Operations	23.80%	40.09%	38.32%
Effective Income Tax Rate Reconciliation, Deferred asset re-measurement as a result of Tax Act	$ 0	$ 6,520	$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0	0	$ 0
Deferred Tax Assets, Gross	20,180	22,907
Deferred Tax Liabilities, Gross	6,698	4,469
Deferred Tax Assets, Net of Valuation Allowance	$ 13,482	$ 18,438