Schedule II Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance, Beginning	$ 14,856	$ 14,120	$ 12,317
Valuation Allowances and Reserves, Charged to Cost and Expense	2,453	1,775	2,106
Valuation Allowances and Reserves, Charged to Other Accounts	(784)	115	267
Valuation Allowances and Reserves, Deductions	564	1,154	570
Valuation Allowances and Reserves, Balance, Ending	15,961	14,856	14,120
Valuation Allowance of Deferred Tax Assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance, Beginning	31,697	23,177	34,738
Valuation Allowances and Reserves, Charged to Cost and Expense	0	0	0
Valuation Allowances and Reserves, Charged to Other Accounts	5,191	10,131	4,764
Valuation Allowances and Reserves, Deductions	625	1,611	16,325
Valuation Allowances and Reserves, Balance, Ending	$ 36,263	$ 31,697	$ 23,177

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Total of 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 established to represent expected future costs.

+ References

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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