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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
Valuation Allowance [Roll Forward]
Valuation allowance, beginning balance	$ 94,952us-gaap_ValuationAllowancesAndReservesBalance	$ 93,576us-gaap_ValuationAllowancesAndReservesBalance	$ 10,248us-gaap_ValuationAllowancesAndReservesBalance
Valuation allowance charged to provision for income taxes	1,505us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense	484us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense	80,974us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense
Valuation allowance amounts charged to other accounts	(13,907)us-gaap_ValuationAllowancesAndReservesChargedToOtherAccounts	892us-gaap_ValuationAllowancesAndReservesChargedToOtherAccounts	2,354us-gaap_ValuationAllowancesAndReservesChargedToOtherAccounts
Valuation allowance, ending balance	$ 82,550us-gaap_ValuationAllowancesAndReservesBalance	$ 94,952us-gaap_ValuationAllowancesAndReservesBalance	$ 93,576us-gaap_ValuationAllowancesAndReservesBalance

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- Definition

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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- Definition

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, charged to costs and expenses.

+ 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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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, charged to accounts other than costs and expenses in a given period.

+ 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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