Stock-based compensation (Tables)

12 Months Ended

Dec. 31, 2019

Executive Officers

Schedule of Unvested Restricted Stock Units Roll Forward

(Not in thousands)	Shares		Weighted-average grant date fair value
Non-vested at January 1, 2017	383,982	$	26.35
Granted	212,200		42.57
Performance Shares Quantity Adjustment	(232,989)		29.10
Vested	(67,853)		48.54
Non-vested at December 31, 2017	295,340	$	30.75
Granted	239,062		45.81
Performance Shares Quantity Adjustment	234,076		33.09
Vested	(372,271)		35.83
Forfeited	(14,021)		37.35
Non-vested at December 31, 2018	382,186	$	36.41
Granted	218,169		55.55
Performance Shares Quantity Adjustment	15,061		55.72
Vested	(270,051)		44.73
Non-vested at December 31, 2019	345,365	$	41.68

Directors

Schedule of Unvested Restricted Stock Units Roll Forward

(Not in thousands)	Restricted stock		Weighted-average grant date fair value	RSU		Weighted-average grant date fair value
Non-vested at January 1, 2017	-		-	-		-
Granted	25,771	$	38.42	-	$	-
Vested	(25,771)		38.42	-		-
Forfeited	-		-	-		-
Non-vested at December 31, 2017	-		-	-		-
Granted	25,159	$	46.71	-	$	-
Vested	(25,159)		46.71	-		-
Forfeited	-		-	-		-
Non-vested at December 31, 2018	-		-	-		-
Granted	1,052	$	49.25	27,449	$	57.64
Vested	(1,052)		49.25	(27,449)		57.64
Forfeited	-		-	-		-
Non-vested at December 31, 2019	-		-	-		-