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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Income Taxes (Textual) [Abstract]
Effective Tax Rate	24.00%	18.00%	21.00%	30.00%	22.00%	21.00%
U.S. tax deductions for employee stock option gains, the tax benefit							$ 7,334
US NOL Carryforwards							9,907
Expiry Date of Operating Loss CarryForward					2022 to 2029
Expiry Date of other deductible carryforwards					2016 to 2018
Foreign NOL Carryforwards							5,535
Other Foreign Deductible Carryforwards							2,770
US statutory rate					34.00%
Minimum [Member]
Income Taxes (Textual) [Abstract]
Effective Tax Rate	21.00%
Maximum [Member]
Income Taxes (Textual) [Abstract]
Effective Tax Rate	22.00%
Foreign Tax Authority [Member]
Income Taxes (Textual) [Abstract]
Valuation Allowance, Amount							$ 2,088

X

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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State the expiration dates of the tax credit carryforward.

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US tax deduction taken for employee stock option gains.

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