Stock-based compensation (Tables)

12 Months Ended

Dec. 31, 2015

Schedule Of Share Based Compensation Stock Options Activity Table Text Block

(Not in thousands)	Options outstanding		Weighted-average exercise price
Outstanding at January 1, 2013	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
Granted	-		-
Exercised	-		-
Forfeited	-		-
Expired	(44,797)		272.00
Outstanding at December 31, 2015	-	$	-

Executive Officers

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

(Not in thousands)	Shares		Weighted-average grant date fair value
Non-vested at January 1, 2013	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
Granted	323,814		33.37
Vested	(430,646)		30.45
Forfeited	(25,446)		28.65
Non-vested at December 31, 2015	495,731	$	28.25

Directors

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, 2013	-		-
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	-		-
Granted	22,119	$	32.29
Vested	(22,119)		32.29
Forfeited	-		-
Non-vested at December 31, 2015	-		-