Goodwill and Other Intangibles (Changes in Net Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, beginning balance	$ 756,384	[1]	$ 756,225
Change in goodwill	758		159
Goodwill, ending balance	$ 757,142		$ 756,384	[1]

[1] Certain prior period amounts have been reclassified to conform to current period presentation. See Note 1 "Summary of Significant Accounting Policies" to the Consolidated Financial Statements for more information.