Subsequent Events (Details) (USD $)	0 Months Ended	1 Months Ended
	Aug. 01, 2012	Aug. 06, 2012
Subsequent Event [Line Items]
Par value per share	$ 0.01
Nonrecognized Subsequent Event [Member]
Subsequent Event [Line Items]
Series A Cumulative Redeemable Preferred Stock Issued	2,300,000
Series A Preferred Stock dividend rate		8.50%
Liquidation preference per share	$ 25.00
Proceeds from Issuance of preferred stock before expenses	$ 55,689,000
Nonrecognized Subsequent Event [Member] | Issuance of Equity [Member]
Subsequent Event [Line Items]
Series A Cumulative Redeemable Preferred Stock Issued	300,000
Revolving Credit Facility [Member] | Wells Fargo Bank [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		200,000