Income Taxes - Reconciliation of Effective Income Taxes Rate (Details 6) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of effective income taxes rate
Taxes at the U.S. statutory rate	35.00%	35.00%	35.00%
State income taxes, net of federal income tax benefit	0.72%	0.95%	(0.02%)
Non-U.S. income taxed at rates different than the U.S. statutory rate	(7.57%)	(9.86%)	(8.99%)
Benefit of scheduled tax credits	(1.32%)	(3.88%)
Foreign source income	$ 3.47	$ 60.94	$ 5.64
Non-deductible expenses	2.79%	(2.42%)	(0.97%)
Non-U.S. adjustments to valuation allowances	(0.43%)	8.18%	(5.72%)
Nontaxable foreign gain	0.00%		(11.47%)
Change in unrecognized tax benefits	0.00%	0.69%	(8.97%)
Other	(0.08%)	(0.65%)	2.09%
Effective income tax rate	32.58%	88.95%	6.59%

Effective income tax rate reconciliation change in unrecognized tax benefits.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to repatriation of foreign earnings.

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