Notes Payable - Gains on Repurchase of Outstanding Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]
Extinguishment of Debt, Amount	$ 0	$ 0	$ 29,100
Gains (Losses) on Extinguishment of Debt	$ 0	$ 0	$ 1,462