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Stockholder's Equity - Stock Options Outstanding and Exercisable (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2013
Qualified Stock Option Plans [Member] | $5.10 [Member] |
Stockholders Equity [Line Items] |
Exercise prices, lower range | $ 5.10
Stock Options Outstanding, Shares Outstanding | 11,000
Stock Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 1 year 11 months 1 day
Stock Options Outstanding, Weighted-Average Exercise Price | $ 5.10
Stock Options, Intrinsic Value of Shares Outstanding | $ 395,000
Stock Options Exercisable, Shares Exercisable | 11,000
Stock Options Exercisable, Weighted-Average Remaining Contractual Life in Years | 1 year 11 months 1 day
Stock Options Exercisable, Weighted-Average Exercise Price | $ 5.10
Stock Options Exercisable, Intrinsic Value of Shares Outstanding | 395,000
Qualified Stock Option Plans [Member] | $7.86 - $8.17 [Member] |
Stockholders Equity [Line Items] |
Exercise prices, lower range | $ 7.86
Exercise prices, upper range | $ 8.17
Stock Options Outstanding, Shares Outstanding | 41,755
Stock Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 4 years 11 months 1 day
Stock Options Outstanding, Weighted-Average Exercise Price | $ 7.87
Stock Options, Intrinsic Value of Shares Outstanding | 1,384,000
Stock Options Exercisable, Shares Exercisable | 30,030
Stock Options Exercisable, Weighted-Average Remaining Contractual Life in Years | 4 years 11 months 1 day
Stock Options Exercisable, Weighted-Average Exercise Price | $ 7.86
Stock Options Exercisable, Intrinsic Value of Shares Outstanding | 996,000
Qualified Stock Option Plans [Member] | $9.69 - $9.97 [Member] |
Stockholders Equity [Line Items] |
Exercise prices, lower range | $ 9.69
Exercise prices, upper range | $ 9.97
Stock Options Outstanding, Shares Outstanding | 132,650
Stock Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 4 years 9 months 29 days
Stock Options Outstanding, Weighted-Average Exercise Price | $ 9.69
Stock Options, Intrinsic Value of Shares Outstanding | 4,156,000
Stock Options Exercisable, Shares Exercisable | 85,400
Stock Options Exercisable, Weighted-Average Remaining Contractual Life in Years | 4 years 9 months 29 days
Stock Options Exercisable, Weighted-Average Exercise Price | $ 9.69
Stock Options Exercisable, Intrinsic Value of Shares Outstanding | 2,675,000
Qualified Stock Option Plans [Member] | $29.99 - $34.50 [Member] |
Stockholders Equity [Line Items] |
Exercise prices, lower range | $ 29.99
Exercise prices, upper range | $ 34.5
Stock Options Outstanding, Shares Outstanding | 228,000
Stock Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 7 years 10 months 24 days
Stock Options Outstanding, Weighted-Average Exercise Price | $ 34.40
Stock Options, Intrinsic Value of Shares Outstanding | 1,509,000
Stock Options Exercisable, Shares Exercisable | 75,240
Stock Options Exercisable, Weighted-Average Remaining Contractual Life in Years | 7 years 10 months 24 days
Stock Options Exercisable, Weighted-Average Exercise Price | $ 34.40
Stock Options Exercisable, Intrinsic Value of Shares Outstanding | 498,000
Qualified Stock Option Plans [Member] | $5.10 - $34.50 [Member] |
Stockholders Equity [Line Items] |
Exercise prices, lower range | $ 5.1
Exercise prices, upper range | $ 34.5
Stock Options Outstanding, Shares Outstanding | 413,405
Stock Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 6 years 5 months 16 days
Stock Options Outstanding, Weighted-Average Exercise Price | $ 23.01
Stock Options, Intrinsic Value of Shares Outstanding | 7,444,000
Stock Options Exercisable, Shares Exercisable | 201,670
Stock Options Exercisable, Weighted-Average Remaining Contractual Life in Years | 5 years 9 months 29 days
Stock Options Exercisable, Weighted-Average Exercise Price | $ 18.39
Stock Options Exercisable, Intrinsic Value of Shares Outstanding | 4,564,000
Non-Qualified Stock Option Plans [Member] | $7.86 [Member] |
Stockholders Equity [Line Items] |
Exercise prices, lower range | $ 7.86
Stock Options Outstanding, Shares Outstanding | 26,225
Stock Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 4 years 3 months 29 days
Stock Options Outstanding, Weighted-Average Exercise Price | $ 7.86
Stock Options, Intrinsic Value of Shares Outstanding | 870,000
Stock Options Exercisable, Shares Exercisable | 20,975
Stock Options Exercisable, Weighted-Average Remaining Contractual Life in Years | 4 years 3 months 29 days
Stock Options Exercisable, Weighted-Average Exercise Price | $ 7.86
Stock Options Exercisable, Intrinsic Value of Shares Outstanding | 695,000
Non-Qualified Stock Option Plans [Member] | $8.01 [Member] |
Stockholders Equity [Line Items] |
Exercise prices, lower range | $ 8.01
Stock Options Outstanding, Shares Outstanding | 155,000
Stock Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 2 years 9 months
Stock Options Outstanding, Weighted-Average Exercise Price | $ 8.01
Stock Options, Intrinsic Value of Shares Outstanding | 5,116,000
Stock Options Exercisable, Shares Exercisable | 20,000
Stock Options Exercisable, Weighted-Average Remaining Contractual Life in Years | 2 years 9 months
Stock Options Exercisable, Weighted-Average Exercise Price | $ 8.01
Stock Options Exercisable, Intrinsic Value of Shares Outstanding | 660,000
Non-Qualified Stock Option Plans [Member] | $34.50 [Member] |
Stockholders Equity [Line Items] |
Exercise prices, lower range | $ 34.50
Stock Options Outstanding, Shares Outstanding | 5,000
Stock Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 7 years 11 months 1 day
Stock Options Outstanding, Weighted-Average Exercise Price | $ 34.50
Stock Options, Intrinsic Value of Shares Outstanding | 33,000
Stock Options Exercisable, Shares Exercisable | 1,650
Stock Options Exercisable, Weighted-Average Remaining Contractual Life in Years | 7 years 11 months 1 day
Stock Options Exercisable, Weighted-Average Exercise Price | $ 34.50
Stock Options Exercisable, Intrinsic Value of Shares Outstanding | 11,000
Non-Qualified Stock Option Plans [Member] | $7.86 - $34.50 [Member] |
Stockholders Equity [Line Items] |
Exercise prices, lower range | $ 7.86
Exercise prices, upper range | $ 34.5
Stock Options Outstanding, Shares Outstanding | 186,225
Stock Options Outstanding, Weighted-Average Remaining Contractual Life in Years | 3 years 1 month 10 days
Stock Options Outstanding, Weighted-Average Exercise Price | $ 8.70
Stock Options, Intrinsic Value of Shares Outstanding | 6,019,000
Stock Options Exercisable, Shares Exercisable | 42,625
Stock Options Exercisable, Weighted-Average Remaining Contractual Life in Years | 3 years 8 months 23 days
Stock Options Exercisable, Weighted-Average Exercise Price | $ 8.96
Stock Options Exercisable, Intrinsic Value of Shares Outstanding | $ 1,366,000

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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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