Goodwill and Intangible Assets Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		8 months 13 days
Impairment of Intangible Assets, Finite-lived	$ 33,742	$ 0	$ 33,742	$ 0
Impairment of Long-Lived Assets Held-for-use		0	0	$ 0
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	67,438	67,317	67,438
Accumulated Amortization	$ 57,188	$ 63,216	$ 57,188