Goodwill and Other Intangible Assets (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Reconciliation of goodwill and accumulated goodwill impairment losses
Balance at the beginning of the period, Goodwill gross			$ 2,214,546,000
Balance at the beginning of the period, Accumulated goodwill impairment losses			(833,857,000)
Balance at the beginning of the period, Goodwill, net			1,380,689,000
Goodwill impairment losses			(68,727,000)
Other			(2,549,000)
Balance at the end of the period, Goodwill gross	2,211,997,000		2,211,997,000
Balance at the end of the period, Accumulated goodwill impairment losses	(902,584,000)		(902,584,000)
Balance at the end of the period, Goodwill, net	1,309,413,000		1,309,413,000
Intangible assets
Indefinite-life intangible assets, Gross Carrying Value	676,968,000		676,968,000		675,901,000
Finite-lived intangible assets, Accumulated Amortization	56,111,000		56,111,000		50,153,000
Finite-lived intangible assets, Net Book Value	21,499,000		21,499,000
Intangible assets, Gross Carrying Value	754,578,000		754,578,000		756,630,000
Intangible assets, Net Book Value	698,467,000		698,467,000		706,477,000
Intangible asset amortization expense	5,100,000	40,000	6,000,000	200,000
Expected future amortization expense
Remainder of 2013	10,148,000		10,148,000
2014	11,332,000		11,332,000
2015	19,000		19,000
Finite-lived intangible assets, Net Book Value	21,499,000		21,499,000
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Reconciliation of goodwill and accumulated goodwill impairment losses
Goodwill impairment losses	(68,700,000)
Intangible assets
Pre-tax impairment charge	3,100,000
Impairment charge, net of tax	1,900,000
Goodwill impairment charge, net of taxes	68,600,000
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Intangible assets
Finite-lived intangible assets, Gross Carrying Value	20,949,000		20,949,000		24,068,000
Finite-lived intangible assets, Accumulated Amortization	4,190,000		4,190,000
Finite-lived intangible assets, Net Book Value	16,759,000		16,759,000		24,068,000
Expected future amortization expense
Finite-lived intangible assets, Net Book Value	16,759,000		16,759,000		24,068,000
Other intangible assets
Intangible assets
Finite-lived intangible assets, Gross Carrying Value	56,661,000		56,661,000		56,661,000
Finite-lived intangible assets, Accumulated Amortization	51,921,000		51,921,000		50,153,000
Finite-lived intangible assets, Net Book Value	4,740,000		4,740,000		6,508,000
Expected future amortization expense
Finite-lived intangible assets, Net Book Value	$ 4,740,000		$ 4,740,000		$ 6,508,000