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Share-Based Compensation - Summary of Information on Stock Options Outstanding and Exercisable (Details) (USD $) | 12 Months Ended
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Dec. 31, 2013
Range One |
Summary of information concerning stock options outstanding and exercisable |
Range of Exercise Prices, upper limit | $ 17.62
Options Outstanding, Shares | 262,788
Options Outstanding, Weighted-Average Remaining Contractual Life | 5 years 8 months 12 days
Options Outstanding, Weighted-Average Exercise Price | $ 17.62
Options Exercisable, Shares | 262,788
Options Exercisable, Weighted-Average Exercise Price | $ 17.62
Range Two |
Summary of information concerning stock options outstanding and exercisable |
Range of Exercise Prices, upper limit | $ 22.85
Options Outstanding, Shares | 10,895
Options Outstanding, Weighted-Average Remaining Contractual Life | 1 year 10 months 24 days
Options Outstanding, Weighted-Average Exercise Price | $ 22.85
Options Exercisable, Shares | 10,895
Options Exercisable, Weighted-Average Exercise Price | $ 22.85
Range Three |
Summary of information concerning stock options outstanding and exercisable |
Range of Exercise Prices, upper limit | $ 31.03
Options Outstanding, Shares | 22,118
Options Outstanding, Weighted-Average Remaining Contractual Life | 1 year 2 months 12 days
Options Outstanding, Weighted-Average Exercise Price | $ 31.03
Options Exercisable, Shares | 22,118
Options Exercisable, Weighted-Average Exercise Price | $ 31.03
Range Four |
Summary of information concerning stock options outstanding and exercisable |
Range of Exercise Prices, upper limit | $ 35.28
Options Outstanding, Shares | 18,522
Options Outstanding, Weighted-Average Remaining Contractual Life | 1 month 6 days
Options Outstanding, Weighted-Average Exercise Price | $ 35.28
Options Exercisable, Shares | 18,522
Options Exercisable, Weighted-Average Exercise Price | $ 35.28
Range Five |
Summary of information concerning stock options outstanding and exercisable |
Range of Exercise Prices, lower limit | $ 17.62
Range of Exercise Prices, upper limit | $ 35.28
Options Outstanding, Shares | 314,323
Options Outstanding, Weighted-Average Remaining Contractual Life | 5 years 1 month 6 days
Options Outstanding, Weighted-Average Exercise Price | $ 19.79
Options Exercisable, Shares | 314,323
Options Exercisable, Weighted-Average Exercise Price | $ 19.79

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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 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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