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Share Capital (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock Appreciation Rights [Member]
Number Outstanding, Begining balance	3,158,129	3,331,103	3,518,769
Number Outstanding, Vested	0	0	0
Number Outstanding, Granted	0	0	0
Number Outstanding, Exercised	(69,365)	(172,974)	(187,666)
Number Outstanding, Expired and cancelled	0	0	0
Number Outstanding, Ending balance	3,088,764	3,158,129	3,331,103
Weighted Average Price per Share, Begining balance	$ 3.75	$ 3.78	$ 3.80
Weighted Average Price per Share, Vested	$ 0	$ 0	$ 0
Weighted Average Price per Share, Granted	$ 0	$ 0	$ 0
Weighted Average Price per Share, Exercised	$ 4.41	$ 4.23	$ 4.19
Weighted Average Price per Share, Expired and cancelled	$ 0	$ 0
Weighted Average Price per Share, Ending Balance	$ 3.74	$ 3.75	$ 3.78
Number Exercisable, Begining balance	2,067,123	1,777,034	30,000
Number Exercisable, Ending Balance (in shares)	3,088,764	2,067,123	1,777,034
Weighted Average Price per Share, Exercisable, begining Balance	$ 3.75	$ 3.77	$ 8.18
Weighted Average Price per Share, Exercisable, Ending balance	$ 3.74	$ 3.75	$ 3.77
Non Vested Stock Appreciation Rights [Member]
Number Outstanding, Begining balance	1,091,006	1,554,069	3,488,769
Number Outstanding, Vested	(1,047,026)	(290,089)	(1,747,034)
Number Outstanding, Granted	0		0
Number Outstanding, Exercised	(43,980)	(172,974)	(187,666)
Number Outstanding, Expired and cancelled	0	0	0
Number Outstanding, Ending balance	0	1,091,006	1,554,069

X

- Definition

The weighted average fair value of vested awards on equity-based plans excluding stock options (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

The number of equity-based payment instruments, excluding stock options, that were exercised during the reporting period.

+ References

No definition available.

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- Definition

The weighted average of equity-based payment instruments other than stock options which were exercised during the reporting period.

+ References

No definition available.

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- Definition

The weighted average of equity-based payment instruments other than stock options which were forfeited during the reporting period.

+ References

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding stock options (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) as of the balance sheet date.

+ References

No definition available.

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- Definition

The weighted average of equity-based payment instruments other than stock options which vested during the reporting period.

+ References

No definition available.

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- Definition

The number of vested equity-based payment instruments, excluding stock options, that validly exist and are outstanding as of the beginning of the period.

+ References

No definition available.

+ Details

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- Definition

The number of vested equity-based payment instruments, excluding stock options, that validly exist and are outstanding as of the balance sheet date.

+ References

No definition available.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ 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)(iv)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(e)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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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



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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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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



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ 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)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(b)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(a)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ 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)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



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-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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