v2.4.0.8

Summary of Transactions in Stock-Based Compensation Plans (Details) (USD $) |  | 9 Months Ended | 12 Months Ended | 2 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Sep. 30, 2013 Shares Available For Grant | Dec. 31, 2012 Shares Available For Grant | Dec. 31, 2011 Shares Available For Grant | Dec. 31, 2010 Shares Available For Grant | Mar. 01, 2013 RSUs | Sep. 30, 2013 RSUs | Dec. 31, 2012 RSUs | Dec. 31, 2011 RSUs | Sep. 30, 2013 Stock Options | Dec. 31, 2012 Stock Options | Dec. 31, 2011 Stock Options | Dec. 31, 2010 Stock Options | Sep. 30, 2013 Restricted Stock | Dec. 31, 2012 Restricted Stock | Dec. 31, 2011 Restricted Stock | Dec. 31, 2010 Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Including Options, Shares Available for Grant [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, beginning of period |  | 14,643,932 | 15,752,370 | 4,280,180 | 7,285,606 |  |  |  |  |  |  |  |  |  |  |  |
Granted |  | (924,312) | (1,504,410) | (1,643,348) | (3,423,066) |  |  |  |  |  |  |  |  |  |  |  |
Shares issued for director compensation |  |  |  | (31,166) |  |  |  |  |  |  |  |  |  |  |  |  |
Cancelled |  | 177,174 | 395,972 | 346,704 | 417,640 |  |  |  |  |  |  |  |  |  |  |  |
Additional shares authorized |  |  |  | 12,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, end of period |  | 13,896,794 | 14,643,932 | 15,752,370 | 4,280,180 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, beginning of period | 9,355,070 |  |  |  |  |  |  |  |  | 9,355,070 | 13,078,092 | 16,147,930 | 18,658,814 |  |  |  |
Granted |  |  |  |  |  |  |  |  |  |  |  |  | 3,423,066 |  |  |  |
Exercised |  |  |  |  |  |  |  |  |  | (2,143,544) | (3,446,472) | (2,768,038) | (5,516,310) |  |  |  |
Cancelled |  |  |  |  |  |  |  |  |  | (79,920) | (276,550) | (301,800) | (417,640) |  |  |  |
Balance, end of period | 9,355,070 |  |  |  |  |  |  |  |  | 7,131,606 | 9,355,070 | 13,078,092 | 16,147,930 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, weighted average exercise price, beginning of period | $ 6.90 |  |  |  |  |  |  |  |  | $ 6.90 | $ 6.47 | $ 6.14 | $ 4.41 |  |  |  |
Granted, weighted average exercise price |  |  |  |  |  |  |  |  |  |  |  |  | $ 9.98 |  |  |  |
Exercised, weighted average exercise price |  |  |  |  |  |  |  |  |  | $ 6.37 | $ 5.13 | $ 4.31 | $ 2.53 |  |  |  |
Cancelled, weighted average exercise price |  |  |  |  |  |  |  |  |  | $ 8.80 | $ 8.30 | $ 8.44 | $ 8.06 |  |  |  |
Balance, weighted average exercise price, end of period | $ 6.90 |  |  |  |  |  |  |  |  | $ 7.04 | $ 6.90 | $ 6.47 | $ 6.14 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, weighted average grant date fair value, beginning of period |  |  |  |  |  | $ 14.02 | $ 14.02 | $ 11.80 |  |  |  |  |  | $ 9.47 | $ 9.49 | $ 9.50 | $ 9.50
Granted, weighted average grant date fair value |  |  |  |  |  |  | $ 22.18 | $ 15.86 | $ 11.80 |  |  |  |  |  |  |  |
Vested, weighted average grant date fair value |  |  |  |  |  |  | $ 15.04 | $ 13.09 | $ 11.84 |  |  |  |  | $ 9.54 | $ 9.51 | $ 9.51 | $ 9.51
Cancelled, weighted average grant date fair value |  |  |  |  |  |  | $ 16.14 | $ 14.03 | $ 11.77 |  |  |  |  |  |  |  |
Balance, weighted average grant date fair value, end of period |  |  |  |  |  |  | $ 16.63 | $ 14.02 | $ 11.80 |  |  |  |  | $ 9.30 | $ 9.47 | $ 9.49 | $ 9.50
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, beginning of period |  |  |  |  |  | 2,351,362 | 2,351,362 | 1,433,582 |  |  |  |  |  | 116,000 | 212,000 | 308,000 | 404,000
Granted |  |  |  |  |  | 594,700 | 924,312 | 1,504,410 | 1,643,348 |  |  |  |  |  |  |  |
Vested |  |  |  |  |  |  | (593,671) | (467,208) | (164,862) |  |  |  |  | (86,000) | (96,000) | (96,000) | (96,000)
Cancelled |  |  |  |  |  |  | (97,254) | (119,422) | (44,904) |  |  |  |  |  |  |  |
Balance, end of period |  |  |  |  |  |  | 2,584,749 | 2,351,362 | 1,433,582 |  |  |  |  | 30,000 | 116,000 | 212,000 | 308,000

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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 weighted average fair value at grant date for nonvested equity-based awards issued 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 c(1) -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)(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 weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + 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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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + 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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