Income Taxes Details of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets, Net of Valuation Allowance, Current Classification [Abstract]
Step Up In Tax Basis Due To Exchange Current Deferred Tax Asset	$ 0	$ 13,096
Deferred Tax Assets, Gross, Current	0	13,096
Deferred Tax Assets Gross Noncurrent [Abstract]
Deferred Tax Assets Depreciation And Amortization	29,498	25,978
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits	35,120	32,535
Step Up In Tax Basis Due To Exchange Long Term Deferred Tax Assets	215,827	208,970
Deferred Tax Assets, Other	38,349	27,419
Deferred Tax Assets, Gross, Noncurrent	318,794	294,902
Deferred Tax Liabilities Noncurrent Classification [Abstract]
Long Term Deferred Tax Liabilities Goodwill And Investments	19,169	27,396
Deferred Tax Liabilities, Gross, Noncurrent	19,169	27,396
Net Long Term Deferred Tax Assets Before Valuation Allowance	299,625	267,506
Deferred Tax Assets, Valuation Allowance, Noncurrent	(1,510)	(1,605)
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	$ 298,115	$ 265,901