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

12 Months Ended

Dec. 31, 2012

SHARE CAPITAL AND CAPITAL IN EXCESS OF PAR VALUE:

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

	Common Stock					Class B Common Stock					Treasury Stock					Capital in Excess of Par
	Shares		Amount			Shares		Amount			Shares		Amount			Value
	(000’s)					(000’s)					(000’s)
Balance at January 1, 2010	35,802		$	24,862		19,919		$	13,833		(67	)	$	(1,992	)	$	482,250
Issuance of 3% stock dividend	1,070		743			597		414			(2	)	—			45,526
Conversion of Class B common shares to common shares	50		35			(50	)	(35		)	—		—			—
Purchase and retirement of common shares	(865	)	(600		)	—		—			—		—			(22,281		)
Balance at December 31, 2010	36,057		25,040			20,466		14,212			(69	)	(1,992		)	505,495
Issuance of 3% stock dividend	1,077		748			612		426			(2	)	—			45,880
Conversion of Class B common shares to common shares	53		37			(53	)	(37		)	—		—			—
Purchase and retirement of common shares	(708	)	(492		)	—		—			—		—			(17,698		)

	Common Stock					Class B Common Stock					Treasury Stock					Capital in Excess of Par
	Shares		Amount			Shares		Amount			Shares		Amount			Value
	(000’s)					(000’s)					(000’s)
Balance at December 31, 2011	36,479		$	25,333		21,025		$	14,601		(71	)	$	(1,992	)	$	533,677
Issuance of 3% stock dividend	1,085		753			631		437			(2	)	—			37,046
Conversion of Class B common shares to common shares	29		20			(29	)	(20		)	—		—			—
Purchase and retirement of common shares	(944	)	(656		)	—		—			—		—			(23,147		)
Balance at December 31, 2012	36,649		$	25,450		21,627		$	15,018		(73	)	$	(1,992	)	$	547,576

Schedule of shares purchased and retired

Year	Total Number of Shares Purchased (000’s)	Average Price Paid Per Share
2012	944	$	25.16
2011	708	$	25.64
2010	865	$	26.41