Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Accumulated impairment loss			$ 8,300
Aggregate amortization expense			14,800	$ 14,900	$ 14,200
Intangible asset impairment charges			$ 0	$ 1,102	$ 8,089
Ostial Solutions, LLC
Finite-Lived Intangible Assets [Line Items]
Intangible asset impairment charges	$ 1,100	$ 8,100
Contingent consideration benefit	$ 874	$ 3,800