CAPITAL STOCK (Tables)

12 Months Ended

Dec. 31, 2018

CAPITAL STOCK

Schedule of number of shares of common stock and treasury stock and the share activity

	Common Shares		Treasury Shares
	2018	2017	2018	2017
Balance at the beginning of the year	66,742,490	66,012,843	4,881,889	3,865,863
Employee option exercises	1,182,547	1,173,936	(502,005)	(394,991)
Restricted stock vestings	39,691	67,708	—	—
Common stock repurchases	—	—	45,000	1,411,017
Common stock repurchased and retired	(623,412)	(511,997)	—	—
Balance at the end of the year	67,341,316	66,742,490	4,424,884	4,881,889