Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

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

Following is a summary of stock option activity for the year ended December 31, 2014, relating to the stock options awarded under the 2009 LTIP and the 1993 Plan:

	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (a) (In thousands)
Options outstanding at December 31, 2013	1,901,677		$	24.91	5.58	$	11,918
Granted	397,500		23.79
Exercised	(147,619	)	13.17
Forfeited	(135,190	)	41.07
Options outstanding at December 31, 2014	2,016,368		$	24.47	5.71	$	7,470
Options vested or expected to vest at December 31, 2014	1,990,146		$	24.51	5.67	$	7,407
Options exercisable at December 31, 2014	1,331,418		$	26.23	4.40	$	5,762

(a)Intrinsic value is defined as the amount by which the fair value of the underlying common shares exceeds the exercise price of the option.

Five Year Service Stock Options [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The fair value of our five-year service stock options granted during the years ended December 31, 2014, 2013 and 2012 was established at the date of grant using the Black-Scholes pricing model, with the weighted average assumptions as follows:

	Year Ended December 31,
	2014			2013			2012
Risk-free interest rate	1.75		%	0.88		%	0.82		%
Expected volatility	57.99		%	56.70		%	53.08		%
Expected term (in years)	5.6			5.5			5.5
Weighted average grant date fair value of options granted during the period	$	12.64		$	11.97		$	5.85