Revolving Line of Credit (Details) (USD $)	1 Months Ended	12 Months Ended
	Oct. 07, 2011	Dec. 31, 2012	Dec. 31, 2011
Revolving Line of Credit (Textual) [Abstract]
Line of credit facility, maximum borrowing capacity		$ 50,000,000
Loan bears interest, description of variable rate basis	LIBOR + 1.25% with a 3% LIBOR floor	LIBOR + 3.75%	LIBOR plus 3.25%
Line of credit facility basis spread on variable rate		3.00%
Line of credit facility, expiration date		Mar. 03, 2014
Line of credit facility extended maturity date		Mar. 03, 2015
Line of credit facility, amount outstanding		0	40,000,000
Line of credit facility, commitment fee amount		$ 150,000	$ 119,000