Borrowings (Details 2) (USD $)			1 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jan. 31, 2014 Credit Agreement	Jan. 31, 2014 New Credit Agreement	Jun. 30, 2014 New Credit Agreement
Credit Agreement
Current borrowing capacity			$ 150,000,000	$ 150,000,000
Credit facility initial term			3 years	2 years
Maximum borrowing capacity including accordion expansion				225,000,000
Amount outstanding under Credit Agreement					0
Term loan	5,837,000
Obligations under capital leases	18,244,000
Total	$ 24,081,000	$ 30,332,000