Fair Value Measurements Fair Value Measurements (Change in contingent consideration) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 2,945	[1]	$ 0
Initial recognition	0		2,904
Change in fair value	(898)		41		$ 0
Payments	0		0
Ending Balance	$ 2,047	[1]	$ 2,945	[1]	$ 0

[1] The contingent consideration liability is included in other liabilities in the Consolidated Balance Sheets.