Fair Value Measurements (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) business	Dec. 31, 2014 USD ($)	Mar. 31, 2013
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Number of completed acquisitions | business	1
Carrying value of outstanding debt	$ 221,214	$ 209,911
Senior Subordinated 6.25% Notes
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Carrying value of outstanding debt	$ 210,000	$ 210,000
Senior Subordinated Notes, interest rate	6.25%		6.25%