Subsequent Events (Details) (Subsequent Event [Member], USD $) In Thousands, unless otherwise specified		1 Months Ended
	Aug. 09, 2012 Senior Notes [Member]	Aug. 31, 2012 Ampac-ISP [Member]
Subsequent Events (Textual) [Abstract]
Cash received from subsidiaries		$ 42,000
Aggregate redemption principal amount outstanding	$ 40,000
Debt instrument redemption price percentage	102.25%