Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011		Dec. 31, 2011
Basic EPS:
Income from continuing operations	$ 3,570	$ 20,249
Income from continuing operations, Shares	42,674,000	42,190,000
Less: Income (Loss) from continuing operations allocated to unvested shares	(74)	(370)
Income from continuing operations allocated to common shares	3,496	19,879
Income from continuing operations allocated to common shares, Shares	42,674,000	42,190,000
Income from continuing operations allocated to common shares, per share amount	$ 0.08	$ 0.47
Dilutive Securities:
Plus: Income from continuing operations allocated to unvested shares	74	370
Less: (Income) loss from continuing operations re-allocated to unvested shares	(74)	(368)
Stock Options, Shares	200,000	319,000
Diluted EPS:
Income from Continuing operations allocated to common shares, and assumed share conversions	$ 3,496	$ 19,881	[1],[2]
Income from Continuing operations allocated to common share, and assumed share conversions, shares	42,874,000	42,509,000
Income from continuing operations allocated to common shares, and assumed share conversions, per share amount	$ 0.08	$ 0.47
Earnings Per Share (Textual) [Abstract]
Options to purchase, shares	1,654,405	1,500,000		1,375,281
Options to purchase, exercise price	$ 32.56	$ 32.93
Stock options not included in the computation of diluted EPS	900,000	600,000

[1] (2) Unaudited

[2] (1) $.01 par value.