Basis of Financial Statement Presentation and Summary of Significant Accounting Policies - Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Jun. 23, 2015	Dec. 31, 2014	Jul. 31, 2012	Feb. 04, 2011
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					6.00%
Numerator: [Abstract]
Net Income	$ 5,520	$ 678	$ (3,954)	$ (3,537)
Denominator: [Abstract]
Basic weighted average shares outstanding	22,018,449	21,953,484	22,006,460	21,941,293
Diluted weighted average shares outstanding	22,166,873	22,071,236	22,006,460	21,941,293
Basic earnings (loss) per share	$ 0.25	$ 0.03	$ (0.18)	$ (0.16)
Diluted earnings (loss) per share	$ 0.25	$ 0.03	$ (0.18)	$ (0.16)
7.50% Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.50%		7.50%			7.50%
7.50% Notes [Member] | Senior Convertible Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage								7.50%
7.50% Notes [Member] | Senior Exchange Convertible Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage							7.50%
7.50% Senior Exchange Convertible Notes [Member] | Senior Exchange Convertible Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage							7.50%