Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets (Schedule of Estimated Amortization Expense Relating to Intangible Assets) (Details)

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Goodwill and Other Intangible Assets (Schedule of Estimated Amortization Expense Relating to Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Goodwill and Other Intangible Assets [Abstract]    
2015 $ 88,095us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
2016 85,499us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2017 83,742us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2018 77,836us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2019 71,910us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Thereafter 173,345us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Net book value of other intangible assets $ 597,903us-gaap_FiniteLivedIntangibleAssetsNet $ 622,330us-gaap_FiniteLivedIntangibleAssetsNet