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Equity (Summary of Stock Options by Exercise Price Range) (Details) (USD $) | 12 Months Ended
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Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, minimum | $ 6.15
Exercise price range, maximum | $ 33.75
Number outstanding | 643,595
Options outstanding weighted average remaining contractual life | 3 years 8 months 9 days
Options exercisable | 276,125
$6.15 - $6.93 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, minimum | $ 6.15
Exercise price range, maximum | $ 6.93
Number outstanding | 47,930
Options outstanding weighted average remaining contractual life | 11 months 27 days
Options exercisable | 47,930
$11.30 - $11.41 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, minimum | $ 11.30
Exercise price range, maximum | $ 11.41
Number outstanding | 39,225
Options outstanding weighted average remaining contractual life | 1 month 13 days
Options exercisable | 39,225
$12.14 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, minimum | $ 12.14
Exercise price range, maximum | $ 12.14
Number outstanding | 78,120
Options outstanding weighted average remaining contractual life | 2 years
Options exercisable | 60,010
$13.45 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, minimum | $ 13.45
Exercise price range, maximum | $ 13.45
Number outstanding | 3,000
Options outstanding weighted average remaining contractual life | 1 year 29 days
Options exercisable | 1,875
$15.59 - $15.62 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, minimum | $ 15.59
Exercise price range, maximum | $ 15.62
Number outstanding | 113,010
Options outstanding weighted average remaining contractual life | 3 years 10 months 24 days
Options exercisable | 44,550
$17.07 - $17.94 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, minimum | $ 17.07
Exercise price range, maximum | $ 17.94
Number outstanding | 6,750
Options outstanding weighted average remaining contractual life | 2 years 8 months 5 days
Options exercisable | 1,625
$19.03 - $19.33 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, minimum | $ 19.03
Exercise price range, maximum | $ 19.33
Number outstanding | 219,210
Options outstanding weighted average remaining contractual life | 4 years 1 month 10 days
Options exercisable | 80,910
$21.76 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, minimum | $ 21.76
Exercise price range, maximum | $ 21.76
Number outstanding | 5,000
Options outstanding weighted average remaining contractual life | 4 years 1 month 2 days
Options exercisable |
$22.20 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, minimum | $ 22.20
Exercise price range, maximum | $ 22.20
Number outstanding | 4,000
Options outstanding weighted average remaining contractual life | 5 years 1 month 2 days
Options exercisable |
$35.75 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, minimum | $ 33.75
Exercise price range, maximum | $ 33.75
Number outstanding | 127,350
Options outstanding weighted average remaining contractual life | 6 years
Options exercisable |

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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 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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