SHARE CAPITAL AND CAPITAL IN EXCESS OF PAR VALUE: (Tables)

12 Months Ended

Dec. 31, 2015

SHARE CAPITAL AND CAPITAL IN EXCESS OF PAR VALUE:

Schedule of changes in share capital and capital in excess of par value

										Capital in
				Class B						Excess
	Common Stock			Common Stock			Treasury Stock			of Par
	Shares	Amount		Shares	Amount		Shares	Amount		Value
	(000’s)			(000’s)			(000’s)
Balance at January 1, 2013	36,649	$	25,450	21,627	$	15,018	73	$	(1,992)	$	547,576
Issuance of 3% stock dividend	1,095		761	648		450	3		—		47,714
Conversion of Class B common shares to common shares	19		13	(19)		(13)	—		—		—
Purchase and retirement of common shares	(752)		(522)	—		—	—		—		(22,621)
Balance at December 31, 2013	37,011		25,702	22,256		15,455	76		(1,992)		572,669
Issuance of 3% stock dividend	1,099		763	667		464	2		—		50,939
Conversion of Class B common shares to common shares	36		25	(36)		(25)	—		—		—
Purchase and retirement of common shares	(861)		(598)	—		—	—		—		(24,422)
Balance at December 31, 2014	37,285		25,892	22,887		15,894	78		(1,992)		599,186
Issuance of 3% stock dividend	1,112		773	687		476	2		—		55,982
Conversion of Class B common shares to common shares	32		22	(32)		(22)	—		—		—
Purchase and retirement of common shares	(1,047)		(727)	—		—	—		—		(32,286)
Balance at December 31, 2015	37,382	$	25,960	23,542	$	16,348	80	$	(1,992)	$	622,882

Schedule of shares purchased and retired

	Total Number of Shares
Year	Purchased (000’s)	Average Price Paid Per Share
2015	1,047	$	31.47
2014	861	$	29.02
2013	752	$	30.73