XML 61 R47.htm IDEA: XBRL DOCUMENT v3.6.0.2
Summary of Significant Accounting Policies - Finite-lived and Indefinite-lived Assets (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
USD ($)
item
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Goodwill and Other Intangible Assets      
Goodwill $ 989,685 $ 911,942 $ 874,184
Other intangible assets, net $ 435,494 $ 391,442  
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