Fair Value of Financial Instruments Narrative (Details) (USD $)	0 Months Ended			1 Months Ended			1 Months Ended
	Apr. 25, 2013	Sep. 30, 2013	Dec. 31, 2012	May 31, 2011 Convertible Debt Securities [Member]	Mar. 31, 2012 Credit Facility Receivable [Member]	Sep. 30, 2013 Credit Facility Receivable [Member]	Jun. 30, 2013 LIBOR Credit Facility Receivable [Member]
Fair Value of Financial Instruments (Textual) [Abstract]
Carrying value of long-term debt		$ 185,723,000	$ 105,328,000
Fair value of long-term debt		173,500,000	105,300,000
Fair Value of Financial Instruments (Additional Textual) [Abstract]
Principal amount of convertible note				6,500,000
Basis spread on annual rate of loan		11.50%
Interest rate on convertible note				4.00%			0.25%
Number of common shares note receivable converted into	1,533,858
Post-conversion equity ownership percentage in investee	16.00%
Note and accrued interest, fair value	6,500,000	4,200,000
Note and accrued interest, carrying value	7,000,000
Realized loss on convertible note prior to conversion	(500,000)
Credit facility to investee					4,000,000
Original term of credit facility to investee					1 year
Optional extended term of credit facility to investee					1 year
Amount drawn on credit facility by investee						$ 4,000,000