Subsequent Event Subsequent Event (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended			1 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Sep. 30, 2011	Jul. 31, 2012 Reduction in credit facility [Member]
Subsequent Event [Line Items]
Revolving Credit Facility, Maximum Borrowing Capacity		$ 150,000		$ 150,000	$ 100,000	$ 0
Loss on early retirement of debt	$ 0	$ 899	$ 0	$ 899		$ 325