Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of Effective Income Tax Rate (Details)

v2.4.1.9
Income Taxes - Reconciliation of Effective Income Tax Rate (Details)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
U.S. federal statutory tax rate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Non-controlling interest (4.80%)us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense (3.30%)us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense (1.40%)us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense
State tax benefit 4.30%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 4.50%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 2.70%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Uncertain tax position (12.50%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies
Net impact of non-U.S. taxes (2.00%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (0.80%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Valuation allowance (19.80%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance (34.30%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance (33.20%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Other (0.60%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (1.90%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (3.10%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective tax rate as reported (0.40%)us-gaap_EffectiveIncomeTaxRateContinuingOperations (0.80%)us-gaap_EffectiveIncomeTaxRateContinuingOperations 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations