Stock-based compensation (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]

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

The significant weighted average assumptions for the years ended December 31, 2012, 2011 and 2010 were as follows:

	2012			2011			2010
Risk free interest rate		0.26	%		1.33	%		0.54	%
Expected option life (years)		1.5			3.4			1.6
Expected volatility		43.43	%		68.18	%		56.97	%
Expected dividend yield		3.78	%		2.89	%		2.49	%

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

A summary of the Company’s stock option activity for the year ended December 31, 2012 is as follows:

	Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value (1)
Outstanding at beginning of period		378,394		$	14.91
Granted		15,813			7.13
Exercised		(1,384	)		6.46
Forfeited/expired		(77,169	)		18.99
Outstanding as of December 31, 2012		315,654		$	13.56	2.06 years	$	-
Exercisable as of December 31, 2012		199,300		$	15.34	1.24 years	$	-

(1) The intrinsic value of a stock option represents the amount by which the fair value of the underlying stock, measured by reference to the closing price of the common shares of $7.40 on the Nasdaq Global Select Market on December 31, 2012, exceeds the exercise price of the option.

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

The following table summarizes the weighted average fair value of options at the date of grant and the intrinsic value of options exercised during the years ended December 31, 2012, 2011 and 2010:

	2012		2011		2010
Options granted with an exercise price below market price on the date of grant:
Employees — preferred stock	$	1.28	$	1.47	$	0.70
Overall weighted average	$	1.28	$	1.47	$	0.70
Options granted with an exercise price at market price on the date of grant:
Management employees	$	-	$	4.45	$	-
Employees — common stock	$	3.28	$	4.17	$	1.40
Overall weighted average	$	3.28	$	4.44	$	1.40
Options granted with an exercise price above market price on the date of grant:
Management employees	$	-	$	-	$	-
Employees — preferred stock	$	-	$	-	$	-
Overall weighted average	$	-	$	-	$	-
Total intrinsic value of options exercised	$	1,799	$	1,325	$	365