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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Treasury shares purchased (in shares) | 687,964 us-gaap_TreasuryStockSharesAcquired | 371,220 us-gaap_TreasuryStockSharesAcquired
Shares issued under stock plans (in shares) | 21,629 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross | 72,552 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross

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- Definition Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. + References No definition available. + Details
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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