Stockholders' Equity Stockholders' Equity (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Preferred Stock, Shares Issued	104,574	104,574
Preferred Stock, Par Value Per Share	$ 1.00	$ 1.00	$ 1.00
Preferred Stock, Liquidation Preference Per Share	$ 1,000	$ 1,000
Operating Loss Carryforwards			$ 725,800,000
Common Stock Ownership Enabling Preferred Stock Purchase Rights	4.99%	4.99%
Common Stock Ownership Enabling Preferred Stock Purchase Rights, Incremental	0.50%	0.50%
Preferred Series B [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued	104,574	104,574
Preferred Stock, Par Value Per Share	$ 1.00	$ 1.00
Preferred Stock, Liquidation Preference Per Share	$ 1,000	$ 1,000
Preferred stock	$ 4,600,000	$ 4,600,000	$ 0
Preferred Stock, Dividend Rate, Percentage		7.50%
Preferred stock dividend condition - minimum pension funding	90.00%	90.00%
Preferred stock dividend condition - minimum net income preceding quarter		$ 7,500,000
Preferred stock dividend condition - minimum free cash flow preceding four quarters		35,000,000
Preferred stock dividend condition - minimum cash balance preceding quarter	$ 150,000,000	150,000,000
Preferred Stock, Liquidation Preference, Value	109,600,000	109,600,000
Preferred Stock, Cumulative Undeclared Dividend	$ 5,000,000	$ 5,000,000
Restricted Stock Units (RSUs) [Member]
Class of Stock [Line Items]
Share-based Compensation, Non-Option Equity Instruments, Granted	5,000	30,000