Capital Stock (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 31, 2016	Jun. 30, 2010	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2008	Jan. 25, 2008
Preferred stock, par value			$ 1.00	$ 1.00
Preferred stock, liquidation preference per share			$ 100.00	$ 100.00
Embedded derivative liabilities			$ 1,200,000
Shares authorized for repurchase (in shares)						1,000,000
Total number of shares purchased (in shares)		223,051			491,572
Payments for shares purchased		$ 5,200,000			$ 11,500,000
Preferred dividend payment allowed to defer, description			Because we did not pay our preferred stock dividends for two periods, the per annum rate has increased, commencing January 31, 2016, by an additional 2.00% per $100.00 stated liquidation preference, or $2.00 per annum. If we fail to make additional future scheduled payments, this per annum rate will continue to increase up to a maximum annual dividend rate of twice the original interest rate.
Payment of cash dividends related to unvested stock awards			$ 23,000
Preferred Stock [Member]
Cash redemption price (in dollars per share)			$ 100.00
Period after change of control to redeem shares			120 days
Embedded derivative liabilities			$ 1,200,000
9.50% Series A Preferred Stock [Member]
Cumulative Perpetual Preferred Stock, shares outstanding (in shares)			250,000	250,000
Cumulative Perpetual Preferred Stock, coupon rate (in hundredths)			9.50%	9.50%
9.00% Series B Preferred Stock [Member]
Cumulative Perpetual Preferred Stock, shares outstanding (in shares)			316,250	316,250
Cumulative Perpetual Preferred Stock, coupon rate (in hundredths)			9.00%	9.00%
Series A Cumulative Redeemable Perpetual Preferred Stock [Member]
Cumulative Perpetual Preferred Stock, shares outstanding (in shares)			250,000	250,000
Cumulative Perpetual Preferred Stock, coupon rate (in hundredths)			9.50%	9.50%
Preferred stock, redemption date			Apr. 30, 2018
Series B Cumulative Redeemable Perpetual Preferred Stock [Member]
Cumulative Perpetual Preferred Stock, shares outstanding (in shares)			316,250	316,250
Cumulative Perpetual Preferred Stock, coupon rate (in hundredths)			9.00%	9.00%
Preferred stock, redemption date			Oct. 30, 2018
Preferred Stock Dividends Not Paid For Two Periods [Member] | Subsequent Event [Member]
Preferred stock, liquidation preference per share	$ 2.00
Increase in preferred stock dividend rate percentage	2.00%
Preferred stock liquidation preference value	$ 100.00