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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
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9 Months Ended | 3 Months Ended | 1 Months Ended | 9 Months Ended | 1 Months Ended | 9 Months Ended | |||||||||
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Sep. 30, 2014
Person
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Sep. 30, 2014
Non-employee director option plan
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Jun. 30, 2014
Revisions of Prior Period Reported Amounts
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Jun. 30, 2014
Revisions of Prior Period Reported Amounts
Treasury Stock
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Jun. 30, 2014
Revisions of Prior Period Reported Amounts
Additional Paid-in Capital
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May 31, 2012
Performance Stock Units
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Sep. 30, 2014
Performance Stock Units
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Sep. 30, 2013
Performance Stock Units
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Apr. 30, 2013
Market-performance based restricted stock units (MSUs)
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Apr. 30, 2014
Performance Shares
Share-based Compensation Award, Tranche One
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Apr. 30, 2014
Performance Shares
Share-based Compensation Award, Tranche Two
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Sep. 30, 2014
Performance Shares
Non-employee director option plan
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Sep. 30, 2014
Restricted stock units
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Sep. 30, 2013
Restricted stock units
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Sep. 30, 2014
Restricted stock units
Non-employee director option plan
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| Summary Of Significant Accounting Policies [Line Items] | |||||||||||||||
| Minimum number of customers, partners and employees using BIRT | 200,000,000 | ||||||||||||||
| Minimum number of developers uses BIRT | 3,500,000 | ||||||||||||||
| Revisions of prior period reported amounts | $ 3,750,000 | $ (3,470,000) | |||||||||||||
| Revisions of prior period reported amounts, effect on retained earning | (280,000) | ||||||||||||||
| Award vesting period | 4 years | 2 years | 3 years | 2 years | 4 years | ||||||||||
| Percentage of stock units granted | 200.00% | 200.00% | 100.00% | 150.00% | |||||||||||
| Percentage of earned award vested | 50.00% | ||||||||||||||
| Remaining percentage of earned award to be vested | 50.00% | ||||||||||||||
| Expected dividend yield in the option valuation model | $ 0 | ||||||||||||||
| Share reserve ratio | 1 | ||||||||||||||
| Share-based awards granted | 325,000 | 125,000 | 685,000 | 1,262,500 | 447,500 | 2,348,750 | |||||||||
| Tax benefit realized upon settlement | Greater than 50% | ||||||||||||||
| Period of significant increase decrease in unrecognized tax benefits | 12 months | ||||||||||||||