Summary of Significant Accounting Policies (Details 2) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Goodwill and Other Intangible Assets
Goodwill	$ 911,942	$ 874,184	$ 951,953
Other intangible assets, net	$ 391,442	$ 419,453
Number of issues that arise with respect to assets that require significant management estimates and judgment | item	2
Land Improvements
Estimated useful lives of property and equipment
Useful lives	15 years
Building and Building Improvements | Minimum
Estimated useful lives of property and equipment
Useful lives	5 years
Building and Building Improvements | Maximum
Estimated useful lives of property and equipment
Useful lives	31 years
Furniture, Fixtures and Equipment | Minimum
Estimated useful lives of property and equipment
Useful lives	3 years
Furniture, Fixtures and Equipment | Maximum
Estimated useful lives of property and equipment
Useful lives	31 years