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Share-Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Stock Options |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |
Total share-based compensation expense | $ 10,138 | [1] | $ 8,432 | [1] | $ 13,619 | [1]
Income tax benefit | 4,101 | [1] | 3,104 | [1] | 5,014 | [1]
Share-based compensation, net of income taxes | 6,037 | [1] | 5,328 | [1] | 8,605 | [1]
Stock Options | Direct Cost Of Revenues |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |
Total share-based compensation expense | 6,807 | [1] | 6,012 | [1] | 10,436 | [1]
Stock Options | Selling, General And Administrative Expense |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |
Total share-based compensation expense | 1,849 | [1] | 1,836 | [1] | 2,649 | [1]
Stock Options | Special Charges |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |
Total share-based compensation expense | 1,482 | [1],[2] | 584 | [1],[2] | 534 | [1],[2]
Restricted Stock |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |
Total share-based compensation expense | 25,172 | [3],[4] | 20,577 | [3],[4] | 23,733 | [3]
Income tax benefit | 9,094 | [3],[4] | 6,870 | [3],[4] | 8,749 | [3]
Share-based compensation, net of income taxes | 16,078 | [3],[4] | 13,707 | [3],[4] | 14,984 | [3]
Restricted Stock | Direct Cost Of Revenues |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |
Total share-based compensation expense | 9,181 | [3],[4] | 10,000 | [3],[4] | 14,382 | [3]
Restricted Stock | Selling, General And Administrative Expense |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |
Total share-based compensation expense | 10,053 | [3],[4] | 10,347 | [3],[4] | 9,052 | [3]
Restricted Stock | Special Charges |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |
Total share-based compensation expense | $ 5,938 | [2],[3],[4] | $ 230 | [2],[3],[4] | $ 299 | [2],[3]
[1] | Includes options and cash-settled stock appreciation rights.
[2] | Relates to accelerated recognition of compensation cost of share-based awards (See Note 4 to the Consolidated Financial Statements for information related to the special charges).
[3] | Includes restricted share awards and deferred restricted share units and performance and market condition restricted share units.
[4] | Includes cash-settled restricted stock units.

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References No definition available. + Details
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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