Consolidated Statement of Stockholders' Equity (Unaudited) (USD $) In Thousands		Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Balance at Dec. 31, 2010		$ 716,424	$ 87,318	$ 136,147	$ 415,981	$ 76,978
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(16,880)			(16,880)
Summary of other changes
Compensation expense and related tax benefit for stock based award grants				1,390
Stock repurchased (701,140 shares)			(2,336)	(10,060)
Stock issued for stock-based awards (8,255 shares)			27	112
Dividends on common stock ($0.45 per share)					(11,682)
Change in net unrealized appreciation	[1]					7,208
Change in underfunded status of employee benefit plans						1,254
All other changes in stockholders' equity accounts		(14,087)
Balance at Sep. 30, 2011		$ 685,457	$ 85,009	$ 127,589	$ 387,419	$ 85,440

[1] The change in net unrealized appreciation is net of reclassification adjustments.