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Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Valuation Allowances and Reserves, Beginning Balance | $ 173,577 us-gaap_ValuationAllowancesAndReservesBalance | $ 159,249 us-gaap_ValuationAllowancesAndReservesBalance | $ 128,215 us-gaap_ValuationAllowancesAndReservesBalance
Valuation Allowances and Reserves, Charged to Cost and Expense | 23,515 us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense | 24,404 us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense | 27,751 us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense
Valuation Allowances and Reserves, Period Increase (Decrease) | 8,394 us-gaap_ValuationAllowancesAndReservesPeriodIncreaseDecrease | (10,076)us-gaap_ValuationAllowancesAndReservesPeriodIncreaseDecrease | 3,283 us-gaap_ValuationAllowancesAndReservesPeriodIncreaseDecrease
Valuation Allowances and Reserves, Ending Balance | $ 205,486 us-gaap_ValuationAllowancesAndReservesBalance | $ 173,577 us-gaap_ValuationAllowancesAndReservesBalance | $ 159,249 us-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 + Details
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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 + Details
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- Definition Total increases or decreases in 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 + Details
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