Discontinued Operations (Schedule of Results of Discontinued Operations) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Discontinued Operations and Disposal Groups [Abstract]
Total Revenues	$ 45,763	$ 112,448	$ 219,002	$ 289,715
Income from discontinued operations before income taxes	3,429	16,718	32,166	50,911
Gain on sale	115,679		115,679
Income tax expense (benefit)	39,704	(4,360)	46,029	7,293
Income from discontinued operations, including gain on sale - net of tax	$ 79,404	$ 21,078	$ 101,816	$ 43,618
Basic earnings per common share from discontinued operations	$ 0.37	$ 0.10	$ 0.48	$ 0.21
Diluted earnings per common share from discontinued operations	$ 0.37	$ 0.10	$ 0.48	$ 0.21