Series B Redeemable Preferred Stock (Details) $ / shares in Units, $ in Thousands			12 Months Ended
	Apr. 15, 2016 $ / shares	Jun. 10, 2015 item	Dec. 31, 2015 USD ($) $ / shares item shares	Dec. 31, 2014 shares
Series B Redeemable Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares outstanding | shares			332,500	332,500
Preferred stock, annual dividend rate			10.00%	10.00%
Shares issued, price per share			$ 25.00
Preferred stock, liquidation preference per share			25.00
Preferred stock, fixed annual amount of dividend per share			$ 2.50
Dividends unpaid and accrued | $			$ 1,870
Dividends unpaid and accrued per share			$ 5.625
Preferred stock, stated maturity			0 years
Preferred stock, redemption price			$ 25.00
Series A Preferred Stock And Series B Preferred Stock [Member]
Class of Stock [Line Items]
Number of voting classes | item		1	1
Number of directors shareholders are entitled to elect | item			2
Number of directors elected | item		2
Scenario, Forecast [Member] | Series B Redeemable Preferred Stock [Member]
Class of Stock [Line Items]
Dividends unpaid and accrued per share	$ 6.354167
Preferred stock, redemption price	$ 25.00
Redemption date	Apr. 15, 2016