Fair Value Measurements (Details)	6 Months Ended
	Jun. 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	$ 243,200,000	$ 213,600,000
Senior Subordinated 6.25% Notes
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Carrying value of outstanding debt	$ 210,000,000	$ 210,000,000
Senior Subordinated Notes, interest rate	6.25%		6.25%