Divestitures (Schedule of Results of Discontinued Operations) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]
Total Revenues			$ 219,002
Income from discontinued operations before income taxes			32,167
Gain on sale	$ 2,270	$ 27,512	120,321
Less: income tax expense			49,092
Income from discontinued operations, including gain on sale - net of tax	$ 0	$ 0	$ 103,396
Basic earnings per common share from discontinued operations (in dollars per share)			$ 4.87
Diluted earnings per common share from discontinued operations (in dollars per share)			$ 4.87