Earnings Per Share Attributable to Stockholders (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share Attributable to Stockholders [Abstract]

Computation of Basic and Diluted Earnings Per Share

	Three months ended					Six months ended
	June 30, 2017					June 30, 2017
		Net income	WA				Net income	WA
		attributable to	number		Per share		attributable to	number		Per share
		stockholders	of shares		amount		stockholders	of shares		amount
Basic	$	17,635	107,004,902	$	0.16	$	28,012	106,928,672	$	0.26
Effect of dilutive securities:
PSUs		(545)	534,849		-		(176)	399,203		-
Stock options		-	698,909		-		-	686,353		-
Diluted	$	17,090	108,238,660	$	0.16	$	27,836	108,014,228	$	0.26

	Three months ended					Six months ended
	June 30, 2016					June 30, 2016
		Net income	WA				Net income	WA
		attributable to	number		Per share		attributable to	number		Per share
		stockholders	of shares		amount		stockholders	of shares		amount
Basic	$	39,710	106,245,307	$	0.37	$	69,116	106,581,294	$	0.65
Effect of dilutive securities:
Stock options		-	734,503		-		-	488,116		-
Diluted	$	39,710	106,979,810	$	0.37	$	69,116	107,069,410	$	0.65