Basis of Presentation (Details) - USD ($) $ in Thousands		6 Months Ended
	Jan. 01, 2019	Jun. 30, 2019	Dec. 31, 2018
ASC 842 Implementation [Abstract]
Lease, Practical Expedients, Package [true false]	true
Operating Lease, Liability	$ 24,792	$ 26,778
Separation of Lease and Nonlease Components [Policy Text Block]		We have also elected the practical expedient to not separate lease and non-lease components for the majority of our leases and the election to keep leases with an initial term of 12 months or less off of the balance sheet.The operating lease assets and liabilities are adjusted to include the impact of any lease incentives and non-lease components. We have elected not to separate lease and non-lease components, which include taxes and common area maintenance in some of our leases.
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	0
Operating Lease, Right-of-Use Asset	$ 22,066	$ 23,846	$ 0