Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Basic EPS:
Income from Continuing Operations	$ (2,442)	$ 21,701	$ 82,071
Income, Share Amounts	43,331,000	42,840,000	42,394,000
Income (Loss) from Continuing Operations, Per Basic Share	$ (0.06)	$ 0.51	$ 1.94
Dilutive Securities:
Dilutive Options, Shares		90,000	235,000
Dilutive RSA's, Shares		244,000	267,000
Dilutive RSU's, Shares
Diluted EPS:
Net Income (Loss) Available to Common Stockholders, Diluted	$ (2,442)	$ 21,701	$ 82,071
Weighted Average Number of Shares Outstanding, Diluted	43,331,000	43,174,000	42,896,000
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.06)	$ 0.50	$ 1.91
Earnings Per Share (Textual) [Abstract]
Options to purchase, shares	1,488,314	1,585,594	1,361,779
Options to purchase, exercise price	$ 33.38	$ 33.13	$ 32.46
Antidilutive shares not included in the computation of diluted EPS		1,300,000	800,000
Stock Options [Member]
Earnings Per Share (Textual) [Abstract]
Antidilutive shares not included in the computation of diluted EPS	1,600,000
Restricted Stock Awards [Member]
Earnings Per Share (Textual) [Abstract]
Antidilutive shares not included in the computation of diluted EPS	300,000	300,000	200,000
Performance Awards (RSUs) [Member]
Earnings Per Share (Textual) [Abstract]
Antidilutive shares not included in the computation of diluted EPS	300,000