CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total USD ($)	Common Stock USD ($)	Preferred Stock USD ($)	Paid-in Capital USD ($)	Retained Earnings USD ($)	Deferred Compensation Obligation USD ($)	Accumulated Other Comprehensive Loss USD ($)	Treasury Stock USD ($)	Preferred Stock USD ($)	Preferred Stock	Preferred Stock Paid-in Capital USD ($)
Balance as of beginning of period at Dec. 31, 2010	$ 980,276	$ 267	$ 0	$ 680,981	$ 300,473	$ 2,743	$ (938)	$ (3,250)
Balance as of beginning of period (in shares) at Dec. 31, 2010		45,557,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(132,915)				(132,915)
Dividends paid	(10,316)				(10,316)
Share-based compensation (in shares)		11,000
Share-based compensation	7,430	1		7,429
Deferred compensation	257					877		(620)
Exercise of stock options (in shares)		95,000
Exercise of stock options	1,226	1		1,225
Restricted stock unit vesting (in shares)		51,000
Restricted stock unit vesting	271	1		270
Change in pension and postretirement benefit obligations	(146)						(146)
Other	226			226
Balance as of end of period at Dec. 31, 2011	846,309	270	0	690,131	157,242	3,620	(1,084)	(3,870)
Balance as of end of period (in shares) at Dec. 31, 2011		45,714,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(104,589)				(104,589)
Dividends paid	(5,176)				(5,176)
Dividends declared	(1,687)				(1,687)
Issuance of stock (in shares)		9,200,000								1,150,000
Issuance of stock	43,350	92		43,258					110,462		109,312
Share-based compensation (in shares)		80,000
Share-based compensation	6,347	1		6,346
Deferred compensation (in shares)		35,000
Deferred compensation	(2)					(509)		507
Exercise of stock options (in shares)	0
Restricted stock unit vesting (in shares)		88,000
Restricted stock unit vesting	0	1		(1)
Change in pension and postretirement benefit obligations	102						102
Balance as of end of period at Dec. 31, 2012	895,116	364	1,150	849,046	45,790	3,111	(982)	(3,363)
Balance as of end of period (in shares) at Dec. 31, 2012		55,117,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(143,070)				(143,070)
Dividends declared	(6,900)				(6,900)
Issuance of stock (in shares)		10,000,000
Issuance of stock	42,141	100		42,041
Share-based compensation (in shares)		78,000
Share-based compensation	5,781	1		5,780
Deferred compensation (in shares)		31,000
Deferred compensation	(677)			(679)		(319)		321
Exercise of stock options (in shares)	2,820	3,000
Exercise of stock options	16			16
Restricted stock unit vesting (in shares)		78,000
Restricted stock unit vesting	(251)	1		(252)
Change in pension and postretirement benefit obligations	1,249						1,249
Other	(4,601)			(4,601)	0	0	0	0
Balance as of end of period at Dec. 31, 2013	$ 788,804	$ 466	$ 1,150	$ 891,351	$ (104,180)	$ 2,792	$ 267	$ (3,042)
Balance as of end of period (in shares) at Dec. 31, 2013		65,307,000