Notes Payable - Gains on Repurchase of Outstanding Debt (Details) (USD $)	3 Months Ended				12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Disclosure [Abstract]
Extinguishment of Debt, Amount						$ 29,100,000
Gains on repurchase of debt	$ 1,462,000	$ 0	$ 0	$ 0	$ 0	$ 1,462,000	$ 0