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Common stock (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Common Stock Outstanding Roll Forward [Table Text Block]

The following table provides detailed information on the Bank’s common stock activity per class for each of the years in the three-year period ended December 31, 2012:

(Share units)	“Class A”		“Class B”			“Class E”			“Class F”		Total

Authorized		40,000,000		40,000,000			100,000,000			100,000,000		280,000,000

Outstanding at January 1, 2010		6,342,189		2,584,882			27,618,545			-		36,545,616
Conversions		-		(42,861	)		42,860			-		(1	)
Repurchase of common stock		-		-			(200	)		-		(200	)
Restricted stock issued - directors		-		-			38,115			-		38,115
Exercised stock options - compensation plans		-		-			82,106			-		82,106
Restricted stock units - vested		-		-			44,904			-		44,904
Outstanding at December 31, 2010		6,342,189		2,542,021			27,826,330			-		36,710,540
Conversions		-		(10,095	)		10,095			-		-
Restricted stock issued - directors		-		-			25,541			-		25,541
Exercised stock options - compensation plans		-		-			325,996			-		325,996
Restricted stock units - vested		-		-			69,865			-		69,865
Outstanding at December 31, 2011		6,342,189		2,531,926			28,257,827			-		37,131,942
Conversions		-		-			-			-		-
Restricted stock issued - directors		-		-			32,317			-		32,317
Exercised stock options - compensation plans		-		-			895,674			-		895,674
Restricted stock units - vested		-		-			85,249			-		85,249
Outstanding at December 31, 2012		6,342,189		2,531,926			29,271,067			-		38,145,182

Schedule of Treasury Stock by Class [Table Text Block]

The following table presents information regarding shares repurchased but not retired by the Bank and accordingly classified as treasury stock:

(In thousands, except for share data)	“Class A”				“Class B”				“Class E”
	Shares		Amount		Shares		Amount		Shares			Amount			Shares			Amount
Outstanding at January 1, 2010		318,140		10,708		568,010		15,655		4,548,075			103,239			5,434,225			129,602
Repurchase of common stock		-		-		-		-		200			3			200			3
Restricted stock issued - directors		-		-		-		-		(38,115	)		(909	)		(38,115	)		(909	)
Exercised stock options - compensation plans		-		-		-		-		(82,106	)		(1,958	)		(82,106	)		(1,958	)
Restricted stock units - vested		-		-		-		-		(44,904	)		(1,071	)		(44,904	)		(1,071	)
Outstanding at December 31, 2010		318,140		10,708		568,010		15,655		4,383,150			99,304			5,269,300			125,667
Restricted stock issued - directors		-		-		-		-		(25,541	)		(609	)		(25,541	)		(609	)
Exercised stock options - compensation plans		-		-		-		-		(325,996	)		(7,775	)		(325,996	)		(7,775	)
Restricted stock units - vested		-		-		-		-		(69,865	)		(1,666	)		(69,865	)		(1,666	)
Outstanding at December 31, 2011		318,140		10,708		568,010		15,655		3,961,748			89,254			4,847,898			115,617
Restricted stock issued - directors		-		-		-		-		(32,317	)		(771	)		(32,317	)		(771	)
Exercised stock options - compensation plans		-		-		-		-		(895,674	)		(21,361	)		(895,674	)		(21,361	)
Restricted stock units - vested		-		-		-		-		(85,249	)		(2,033	)		(85,249	)		(2,033	)
Outstanding at December 31, 2012		318,140		10,708		568,010		15,655		2,948,508			65,089			3,834,658			91,452

- Definition

Tabular disclosure of an entity's treasury stock, including the average cost per share, carrying basis for each class of treasury stock, description of share repurchase program authorized by an entity's board of directors, the number of shares repurchased, the cost of the shares repurchased, the remaining maximum dollar value of shares available for repurchase under the program, the treatment of the purchase price in excess of the current market value, number of shares held for each class of treasury stock, and other information necessary to a fair presentation.

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