Stock-based compensation (Tables)

12 Months Ended

Dec. 31, 2014

Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range Text Block

	(Not in thousands)
Exercise price per share				Options outstanding	Weighted-average exercise price of options outstanding		Weighted-average remaining life of options outstanding in years	Options exercisable (fully vested)	Weighted-average exercise price of options exercisable
		$	272.00	44,797	$	272.00	0.12	44,797	$	272.00

Schedule Of Share Based Compensation Stock Options Activity Table Text Block

(Not in thousands)	Options outstanding		Weighted-average exercise price
Outstanding at January 1, 2012	206,946	$	207.83
Granted	-		-
Exercised	-		-
Forfeited	-		-
Expired	(45,960)		155.68
Outstanding at December 31, 2012	160,986	$	222.71
Granted	-		-
Exercised	-		-
Forfeited	-		-
Expired	(60,549)		171.42
Outstanding at December 31, 2013	100,437	$	253.64
Granted	-		-
Exercised	-		-
Forfeited	-		-
Expired	(55,640)		238.85
Outstanding at December 31, 2014	44,797	$	272.00

Management Member

Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block]

(Not in thousands)	Restricted stock		Weighted-average grant date fair value
Non-vested at January 1, 2012	241,934	$	31.98
Granted	359,427		17.72
Vested	(96,353)		37.61
Forfeited	(13,785)		26.59
Non-vested at December 31, 2012	491,223	$	20.59
Granted	229,131		28.20
Vested	(131,324)		31.23
Forfeited	(3,783)		24.63
Non-vested at December 31, 2013	585,247	$	21.16
Granted	365,831		29.86
Vested	(311,078)		19.02
Forfeited	(11,991)		29.33
Non-vested at December 31, 2014	628,009	$	27.13

Director Member

Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block]

(Not in thousands)	Restricted stock		Weighted-average grant date fair value
Nonvested at January 1, 2012	-		-
Granted	41,174	$	16.37
Vested	(41,174)		16.37
Forfeited	-		-
Non-vested at December 31, 2012	-		-
Granted	20,930	$	29.43
Vested	(20,930)		29.43
Forfeited	-		-
Non-vested at December 31, 2013	-		-
Granted	23,135	$	30.43
Vested	(23,135)		30.43
Forfeited	-		-
Non-vested at December 31, 2014	-		-