Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Non-cash employee compensation expense recognized in general and administrative expense in the Statements of Operations with respect to our non-cash employee compensation plans are as follows:

	For the years ended December 31,
	2012		2011		2010
Total stock compensation expense	$	6,111	$	3,385	$	2,975

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

Fair values of options granted in 2012 and 2011 were based on the assumptions noted in the following table:

	For the years ended December 31,
	2012	2011	2010
Expected volatility	57.11% to 87.50%	66.06% to 70.29%	68.67% to 77.37%
Risk-free interest rate	0.36% to 1.91%	0.90% to 2.26%	1.18% to 2.58%
Expected lives	3 to 8 years	6 to 9 years	6 to 9 years
Dividend yield	0%	0%	0%

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding

A summary of option activity under the Plan during the year ended ended December 31, 2012:

	Options (‘000)		Weighted– Average Exercise price (Cdn$)	Weighted– Average Remaining Contractual Term (Years)	Aggregate intrinsic  value Cdn($000)
Outstanding as of December 31, 2011	8,539		3.18	7.0	95
Granted	5,164		1.94	6.4	—
Exercised	(203	)	1.45	3.5	125
Forfeited, canceled and expired	(1,163	)	2.74	6.0	—
Outstanding as of December 31, 2012	12,337		2.74	6.2	541
Exercisable as of December 31, 2012	7,920		3.04	5.7	356

A summary of option activity under the Plan during the year ended ended December 31, 2011:

	Options (‘000)		Weighted– Average Exercise price (Cdn$)	Weighted– Average Remaining Contractual Term (Years)	Aggregate intrinsic  value Cdn($000)
Outstanding as of December 31, 2010	6,724		3.35	7.0	9,001
Granted	2,288		2.67	9.3	—
Exercised	(159	)	1.78	4.6	—
Forfeited, canceled and expired	(314	)	3.67	6.8	—
Outstanding as of December 31, 2011	8,539		3.18	7.0	95
Exercisable as of December 31, 2011	6,233		3.30	6.2	95

A summary of option activity under the Plan during the year ended ended December 31, 2010:

	Options (‘000)		Weighted– Average Exercise price (Cdn$)	Weighted– Average Remaining Contractual Term (Years)	Aggregate intrinsic  value Cdn($000)
Outstanding as of December 31, 2009	7,283		3.19	7.0	4,221
Granted	1,599		3.77	9.3	—
Exercised	(1,149	)	2.11	5.4	2,423
Forfeited, canceled and expired	(1,009	)	4.27	—	—
Outstanding as of December 31, 2010	6,724		3.35	7.0	9,001
Exercisable as of December 31, 2010	4,622		3.48	6.3	5,770

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range

The number of options outstanding by strike price as of December 31, 2012 is shown in the following table:

	Options outstanding			Options exercisable
Range of exercise prices (Cdn$)	Number outstanding at December 31, 2012 (000)	Weighted- average remaining contractual life (years)	Weighted- average exercise price (Cdn$)	Number exercisable at December 31, 2012 (000)	Weighted- average exercise price (Cdn$)
1.00 to 2.50	5,984	6.6	1.88	2,641	1.80
2.51 to 4.00	5,187	6.2	3.23	4,158	3.30
4.01 to 7.00	1,166	3.7	4.99	1,121	5.00
	12,337	6.2	2.74	7,920	3.04

The number of options outstanding by strike price as of December 31, 2011 is shown in the following table:

	Options outstanding			Options exercisable
Range of exercise prices (Cdn$)	Number outstanding at December 31, 2011 (000)	Weighted- average remaining contractual life (years)	Weighted- average exercise price (Cdn$)	Number exercisable at December 31, 2011 (000)	Weighted- average exercise price (Cdn$)
1.00 to 2.50	1,619	7.2	1.66	1,215	1.64
2.51 to 4.00	5,688	7.3	3.22	3,901	3.32
4.01 to 7.00	1,232	4.8	5.00	1,117	5.02
	8,539	6.9	3.18	6,233	3.29

The number of options outstanding by strike price as of December 31, 2010 is shown in the following table:

	Options outstanding			Options exercisable
Range of exercise prices (Cdn$)	Number outstanding at December 31, 2010 (000)	Weighted- average remaining contractual life (years)	Weighted- average exercise price (Cdn$)	Number exercisable at December 31, 2010 (000)	Weighted- average exercise price (Cdn$)
1.00 to 2.50	1,472	7.5	1.61	804	1.53
2.51 to 4.00	3,965	7.2	3.43	2,845	3.44
4.01 to 7.00	1,287	6.0	4.98	973	5.10
	6,724	7.0	3.35	4,622	3.48

Schedule of Nonvested Share Activity

A summary of the status of non-vested options at December 31, 2012, 2011 and 2010 and the changes during the years ended December 31, 2012, 2011 and 2010 is presented below:

	Number of options (000)		Weighted average grant date fair value (Cdn$)
Non-vested at January 1, 2012	2,307		1.91
Granted	5,164		1.21
Vested	(2,658	)	1.43
Forfeited, canceled and expired	(396	)	1.65
Non-vested at December 31, 2012	4,417		1.4
	Number of options (000)		Weighted average grant date fair value (Cdn$)
Non-vested at January 1, 2011	2,102		1.90
Granted	2,288		1.78
Vested	(1,988	)	1.81
Forfeited, canceled and expired	(95	)	2.14
Non-vested at December 31, 2011	2,307		1.91
	Number of options (000)		Weighted average grant date fair value (Cdn$)
Non-vested at January 1, 2010	2,125		1.49
Granted	1,599		2.54
Vested	(1,491	)	1.94
Forfeited, canceled and expired	(131	)	1.73
Non-vested at December 31, 2010	2,102		1.9

Schedule of Unrecognized Compensation Cost, Nonvested Awards

As of December 31, 2012, there was zero unrecognized compensation expense related to DSUs granted under the Company's DSU plan.

	Number of Deferred Share Units		Amount (US$'000)
As of December 31, 2011	22,147		$	49
Grants	394,922		592
Exercises	(29,010	)	(39		)
As of December 31, 2012	388,059		$	602

	Number of Deferred Share Units	Amount (US$'000)
As of December 31, 2010	—	$	—
Grants	22,147	49
Exercises	—	—
As of December 31, 2011	22,147	$	49