Share Capital (Tables)

12 Months Ended

Dec. 31, 2012

Schedule Of Share Based Compensation Performance Shares And Time Based Award Activity [Table Text Block]

The following table summarizes information about time based and financial performance-based restricted stock and restricted stock unit awards granted under the 2005 Incentive Plan, 2008 Key Partner Incentive Plan and 2011 Stock Incentive Plan:

	Performance Based Awards				Time Based Awards
	Shares		Weighted Average  Grant Date Fair Value		Shares		Weighted Average  Grant Date Fair Value
Balance at December 31, 2009		557,958	$	8.17		924,160	$	7.33
Granted		753,209		8.83		258,223		10.28
Vested		(804,300)		8.37		(562,971)		8.60
Forfeited		(4,944)		8.88		(3,345)		8.13
Balance at December 31, 2010		501,923	$	8.83		616,067	$	7.40
Granted		1,097,754		18.39		297,520		16.93
Vested		(217,697)		12.74		(287,234)		5.17
Forfeited		(1,423)		14.59		(41,454)		8.79
Balance at December 31, 2011		1,380,557	$	15.81		584,899	$	12.86
Granted		753,896		13.05		250,237		11.67
Vested		(1,747,987)		14.44		(263,458)		12.25
Forfeited		(29,946)		15.66		(14,720)		14.82
Balance at December 31, 2012		356,520	$	16.09		556,958	$	12.72

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

Information related to share option transactions grant under all plans over the past three years is summarized as follows:

	Options Outstanding				Options Exercisable
	Number  Outstanding		Weighted  Average Price  per Share		Number  Outstanding		Weighted Average Price  per Share		Non Vested  Options
Balance at December 31, 2009		239,992	$	9.55		194,992	$	9.64		45,000
Vested		—		—						(20,000)
Granted		—		—						—
Exercised		(6,495)		9.19						—
Expired and cancelled		(17,297)		17.08						—
Balance at December 31, 2010		216,200	$	9.41		191,200	$	9.41		25,000
Vested		—		—						(20,000)
Granted		—		—						—
Exercised		(113,085)		8.94						—
Expired and cancelled		(15,034)		12.57						—
Balance at December 31, 2011		88,081	$	9.12		83,081	$	9.14		5,000
Vested		—		—						(5,000)
Granted		—		—						—
Exercised		(3,153)		8.69						—
Expired and cancelled		(9,928)		7.79						—
Balance at December 31, 2012		75,000	$	9.53		75,000	$	9.53		—

Schedule of Share-based Compensation, Stock Appreciation Rights Award Activity [Table Text Block]

SAR’s granted and outstanding are as follows:

	SAR’s Outstanding				SAR’s Exercisable
	Weighted Average  Number Outstanding		Weighted  Average  Price per  Share		Number  Outstanding		Price per  Share		Non Vested SAR’s
Balance at December 31, 2009		3,518,769	$	3.80		30,000	$	8.18		3,488,769
Vested		—		—						(1,747,034)
Granted		—		—						—
Exercised		(187,666)	$	4.19						(187,666)
Expired and cancelled		—								—
Balance at December 31, 2010		3,331,103	$	3.78		1,777,034	$	3.77		1,554,069
Vested		—		—						(290,089)
Granted		—		—
Exercised		(172,974)		4.23						(172,974)
Expired and cancelled		—		—						—
Balance at December 31, 2011		3,158,129	$	3.75		2,067,123	$	3.75		1,091,006
Vested		—		—						(1,047,026)
Granted		—		—						—
Exercised		(69,365)		4.41						(43,980)
Expired and cancelled		—		—						—
Balance at December 31, 2012		3,088,764	$	3.74		3,088,764	$	3.74		—

Schedule Of Share Based Compensation Equity Value Appreciation Awards Activity [Table Text Block]

Information related to EVAR transactions over the past three years is summarized as follows:

	EVARs Outstanding				EVARs Exercisable
	Number Outstanding		Weighted  Average  Issuance Price  per Share		Number Outstanding		Weighted  Average  Issuance  Price per  Share		Non Vested EVARs
Balance at December 31, 2010		—	$	—		—	$	—		—
Vested		—		—						—
Granted		1,413,000		23.00		—		—		1,413,000
Expired and cancelled		(45,000)		23.00		—		—		(45,000)
Balance at December 31, 2011		1,368,000	$	23.00		—	$	—		1,368,000
Vested		—		—						—
Granted		—		—						—
Expired and cancelled		(90,000)		23.00		—		—		(90,000)
Balance at December 31, 2012		1,278,000	$	23.00		—	$	—		1,278,000

Employee Stock Option [Member]

Schedule of Share-based Compensation, Activity [Table Text Block]

Share options outstanding as of December 31, 2012 are summarized as follows:

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Outstanding Number		Weighted  Average  Contractual  Life		Weighted  Average  Price per  Share		Exercisable  Number		Weighted  Average  Price per  Share		Weighted  Average  Contractual  Life
$8.75 – $8.95		75,000		3.75	$	9.53		75,000	$	9.53		3.75

Stock Appreciation Rights (SARs) [Member]

Schedule of Share-based Compensation, Activity [Table Text Block]

	SAR’s Outstanding						SAR’s Exercisable
Range of Exercise Prices	Outstanding Number		Weighted Average Contractual Life		Weighted Average Price per Share		Exercisable Number		Weighted Average Price per Share		Weighted Average Contractual Life
$3.72 – $8.94		3,078,764		1.17	$	3.72		3,078,764	$	3.72		1.17
$8.75 – $8.95		10,000		3.33	$	8.95		10,000	$	8.95		3.33