Preferred Shares Preferred Shares (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2013	Sep. 30, 2017	Sep. 30, 2016	Sep. 14, 2017	Dec. 31, 2016	Apr. 10, 2013	Mar. 15, 2007
Investments, Debt and Equity Securities [Abstract]
Preferred Stock, Shares Authorized	2,000,000			2,000,000		2,000,000	2,000,000	2,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01			$ 0.01			$ 0.01
Shares, Issued									4,000,000
Preferred Stock, Dividend Rate, Percentage				9.75%
Preferred Stock, Shares Issued	2,000			2,000			2,000		4,000
Preferred shares redeemed						2,000		2,000
Payments for Repurchase of Redeemable Preferred Stock			$ 50,352	$ 50,420
Preferred Stock, Redemption Price Per Share	$ 609.375			$ 609.375
Preferred Dividends	$ 1,218	$ 1,218		$ 3,656	$ 3,656