Share Based Compensation (Tables)

6 Months Ended

Jun. 30, 2014

Share Based Compensation Tables [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Text Block]

4. SHARE BASED COMPENSATION:
Valuation and Expense Information
			Three Months				Six Months
			Ended June 30,				Ended June 30,
			2014		2013		2014		2013
	Total cost of share-based payment plans	$	(1,041)	$	4,355	$	1,739	$	8,858
	Amounts capitalized in oil and gas properties
	and equipment	$	435	$	1,302	$	710	$	2,796
	Amounts charged against income, before
	income tax benefit (provision)	$	(1,476)	$	3,053	$	1,029	$	6,062
	Amount of related income tax (expense) benefit
	recognized in income before valuation allowance	$	(617)	$	1,257	$	430	$	2,496

Stock Option Activity TextBlock

		Weighted
	Number of	Average
	Options	Exercise Price
	(000's)	(US$)
Balance, December 31, 2012	1,357	$	16.97	to	$	98.87
Forfeited	(110)	$	25.68	to	$	75.18
Exercised	(1)	$	16.97	to	$	16.97
Balance, December 31, 2013	1,246	$	16.97	to	$	98.87
Forfeited	(1)	$	63.05	to	$	63.05
Exercised	(39)	$	16.97	to	$	16.97
Balance, June 30, 2014	1,206	$	25.68	to	$	98.87