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STOCKHOLDERS' EQUITY: (Details 2) (Employee stock purchase plan) | 3 Months Ended
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Mar. 31, 2012
Share based compensation |
Percentage of title acquire by employee in every two years on shares paid in previous two years | 50.00%
The period describing the expiration of the contribution period and the bonus eligibility (in years) | 8
Ratio of bonus shares granted to employee, numerator | 1
Ratio of bonus shares granted to employee, denominator | 10
Voluntary resignation |
Share based compensation |
Deduction over the amount to be paid to the employee on termination of employment after first year (as a percent) | 90.00%
Deduction over the amount to be paid to the employee on termination of employment after second year (as a percent) | 80.00%
Deduction over the amount to be paid to the employee on termination of employment after third year (as a percent) | 70.00%
Deduction over the amount to be paid to the employee on termination of employment after fourth year (as a percent) | 60.00%
Deduction over the amount to be paid to the employee on termination of employment after fifth year (as a percent) | 50.00%
Deduction over the amount to be paid to the employee on termination of employment after sixth year (as a percent) | 40.00%
Deduction over the amount to be paid to the employee on termination of employment after seventh year (as a percent) | 20.00%
Involuntary termination |
Share based compensation |
Deduction over the amount to be paid to the employee on termination of employment after first year (as a percent) | 100.00%
Deduction over the amount to be paid to the employee on termination of employment after second year (as a percent) | 95.00%
Deduction over the amount to be paid to the employee on termination of employment after third year (as a percent) | 90.00%
Deduction over the amount to be paid to the employee on termination of employment after fourth year (as a percent) | 80.00%
Deduction over the amount to be paid to the employee on termination of employment after fifth year (as a percent) | 70.00%
Deduction over the amount to be paid to the employee on termination of employment after sixth year (as a percent) | 60.00%
Deduction over the amount to be paid to the employee on termination of employment after seventh year (as a percent) | 50.00%

X
- Definition Represents the denominator of the ratio of bonus shares granted to the participant upon meeting the eligibility period of the share based compensation plan. + References No definition available. + Details
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Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the numerator of the ratio of bonus shares granted to the participant upon meeting the eligibility period of the share based compensation plan. + References No definition available. + Details
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Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period after which the employee has purchased shares through the plan through payroll deductions and is therefore eligible for the bonus grant. + References No definition available. + Details
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X
- Definition Upon voluntary or involuntary termination of employment, represents the deduction from the amount payable to the employee if the terminating event takes place the fifth year after the grant date, as a percent. The amount payable to the employee is the fair market sales price per fully paid share, net costs and taxes when the fair market value exceeds the purchase price. + References No definition available. + Details
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Period Type: | instant

X
- Definition Upon voluntary or involuntary termination of employment, represents the deduction from the amount payable to the employee if the terminating event takes place the first year after the grant date, as a percent. The amount payable to the employee is the fair market sales price per fully paid share, net costs and taxes when the fair market value exceeds the purchase price. + References No definition available. + Details
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- Definition Upon voluntary or involuntary termination of employment, represents the deduction from the amount payable to the employee if the terminating event takes place the fourth year after the grant date, as a percent. The amount payable to the employee is the fair market sales price per fully paid share, net costs and taxes when the fair market value exceeds the purchase price. + References No definition available. + Details
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X
- Definition Upon voluntary or involuntary termination of employment, represents the deduction from the amount payable to the employee if the terminating event takes place the second year after the grant date, as a percent. The amount payable to the employee is the fair market sales price per fully paid share, net costs and taxes when the fair market value exceeds the purchase price. + References No definition available. + Details
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X
- Definition Upon voluntary or involuntary termination of employment, represents the deduction from the amount payable to the employee if the terminating event takes place the seventh year after the grant date, as a percent. The amount payable to the employee is the fair market sales price per fully paid share, net costs and taxes when the fair market value exceeds the purchase price. + References No definition available. + Details
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- Definition Upon voluntary or involuntary termination of employment, represents the deduction from the amount payable to the employee if the terminating event takes place the sixth year after the grant date, as a percent. The amount payable to the employee is the fair market sales price per fully paid share, net costs and taxes when the fair market value exceeds the purchase price. + References No definition available. + Details
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- Definition Upon voluntary or involuntary termination of employment, represents the deduction from the amount payable to the employee if the terminating event takes place the third year after the grant date, as a percent. The amount payable to the employee is the fair market sales price per fully paid share, net costs and taxes when the fair market value exceeds the purchase price. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

X
- Definition Represents the percentage of title acquired by the employee in every two years on shares paid in previous two years. + References No definition available. + Details
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Data Type: | num:percentItemType
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- Details
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