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Shareholders' Equity - Summary of Nonvested Share Activity (Detail) | 12 Months Ended
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Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Beginning Balance, Number of Shares | 10,679,911
Awards granted, Number of Shares | 6,700,765
Awards forfeited, Number of Shares | (137,227)
Awards cancelled on failed vesting conditions, Number of Shares | (5,915,985)
Awards vested, Number of Shares | (3,100,608)
Ending Balance, Number of Shares | 8,226,856
Employee Plan 2009 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Beginning Balance, Number of Shares | 1,257,038
Awards granted, Number of Shares |
Awards forfeited, Number of Shares | (5,931)
Awards cancelled on failed vesting conditions, Number of Shares |
Awards vested, Number of Shares | (1,251,107)
Ending Balance, Number of Shares |
Employee Plan 2010 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Beginning Balance, Number of Shares | 3,224,558
Awards granted, Number of Shares |
Awards forfeited, Number of Shares | (31,721)
Awards cancelled on failed vesting conditions, Number of Shares |
Awards vested, Number of Shares | (1,707,001)
Ending Balance, Number of Shares | 1,485,836
Employee Plan 2011 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Beginning Balance, Number of Shares | 5,945,815
Awards granted, Number of Shares |
Awards forfeited, Number of Shares | (29,830)
Awards cancelled on failed vesting conditions, Number of Shares | (5,915,985)
Awards vested, Number of Shares |
Ending Balance, Number of Shares |
Employee Plan 2012 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Beginning Balance, Number of Shares |
Awards granted, Number of Shares | 6,520,765
Awards forfeited, Number of Shares | (47,245)
Awards cancelled on failed vesting conditions, Number of Shares |
Awards vested, Number of Shares |
Ending Balance, Number of Shares | 6,473,520
Supervisory Board 2009 Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Beginning Balance, Number of Shares | 35,000
Awards granted, Number of Shares |
Awards forfeited, Number of Shares |
Awards cancelled on failed vesting conditions, Number of Shares |
Awards vested, Number of Shares | (35,000)
Ending Balance, Number of Shares |
Supervisory Board 2010 Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Beginning Balance, Number of Shares | 75,000
Awards granted, Number of Shares |
Awards forfeited, Number of Shares |
Awards cancelled on failed vesting conditions, Number of Shares |
Awards vested, Number of Shares | (45,000)
Ending Balance, Number of Shares | 30,000
Supervisory Board 2011 Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Beginning Balance, Number of Shares | 142,500
Awards granted, Number of Shares |
Awards forfeited, Number of Shares |
Awards cancelled on failed vesting conditions, Number of Shares |
Awards vested, Number of Shares | (62,500)
Ending Balance, Number of Shares | 80,000
Supervisory Board Two Thousand Twelve [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Beginning Balance, Number of Shares |
Awards granted, Number of Shares | 180,000
Awards forfeited, Number of Shares | (22,500)
Awards cancelled on failed vesting conditions, Number of Shares |
Awards vested, Number of Shares |
Ending Balance, Number of Shares | 157,500

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- Definition Share based compensation arrangement by share based payment award equity instruments other than options cancelled on failed vesting conditions in period. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting 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 (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(e) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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 (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(a) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting 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 (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(d) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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