Stock-based compensation (Tables)

6 Months Ended

Jun. 30, 2019

Executive Officers

Schedule of Unvested Restricted Stock Units Roll Forward

(Not in thousands)	Shares		Weighted-Average Grant Date Fair Value
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	217,550		55.56
Performance Shares Quantity Adjustment	22,973		55.51
Vested	(246,508)		45.01
Non-vested at June 30, 2019	376,201	$	43.02

Directors

Schedule of Unvested Restricted Stock Units Roll Forward

(Not in thousands)	Restricted Stock shares		Weighted-Average Grant Date Fair Value per Share	Restricted Stock units		Weighted-Average Grant Date Fair Value per Unit
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	25,460		57.75
Vested	(1,052)		49.25	(25,460)		57.75
Forfeited	-		-	-		-
Non-vested at June 30, 2019	-	$	-	-	$	-