Subsequent Events (Details) (Subsequent event, USD $) In Millions, unless otherwise specified	0 Months Ended
	Aug. 06, 2013
Term loan
Subsequent events
Amount borrowed	$ 100.0
Combined interest rate (as a percent)	3.02%
Term loan | Interest rate swap
Subsequent events
Notional amount of interest rate swap	100.0
Fixed rate of interest (as a percent)	1.27%
Term loan | LIBOR
Subsequent events
Base rate margin (as a percent)	1.75%
JA Holding
Subsequent events
Cash consideration	$ 97.5