Condensed Consolidated Statement Of Stockholders' Equity (Parenthetical)	9 Months Ended
Sep. 30, 2013
Condensed Consolidated Statement Of Stockholders' Equity [Abstract]
Issuance of common stock, shares	529,958
Issuance of deferred stock units, shares	3,776

Number of share options (or share units) exercised during the current period.

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

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration