Income Taxes (Rollforward of Valuation Allowances) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	$ 112,453	$ 70,691	$ 28,402
Expenses	54,706	49,011	51,277
Deductions	(3,810)	(7,265)	(8,375)
Ending Balance	159,677	112,453	70,691
Valuation Allowance
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	331,458	326,837	281,954
Purchase accounting	0	613	3,987
Expenses	28,364	31,540	41,445
Deductions	(2,344)	(23,622)	(3,611)
Other activity (not resulting in expense or deduction)	(4,950)	(3,910)	3,062
Ending Balance	$ 352,528	$ 331,458	$ 326,837

Total of the adjustments in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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