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Stock-Based Compensation (Schedule of Restricted Stock Awards) (Details) (Restricted Stock [Member], USD $) In Thousands, except Share data, unless otherwise specified | 6 Months Ended
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Jun. 30, 2013
Grant Date - 2/1/2012 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Grant Date | February 1, 2012
Shares | 66,000
Grant Date Fair Value | $ 30.15
Aggregate Fair Value | $ 1,990
Grant Date - 3/6/2012 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Grant Date | March 6, 2012
Shares | 18,347
Grant Date Fair Value | $ 27.49
Aggregate Fair Value | 504
Grant Date - 5/23/2012 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Grant Date | May 23, 2012
Shares | 8,000
Grant Date Fair Value | $ 28.05
Aggregate Fair Value | 224
Grant Date - 2/27/13 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Grant Date | February 27, 2013
Shares | 12,973
Grant Date Fair Value | $ 42.49
Aggregate Fair Value | $ 551

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- Definition Fair value of equity-based compensation awards outstanding. + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Grant date of stock-based compensation. + References No definition available. + 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 + Details
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Period Type: | duration

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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 + Details
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- Details
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