Investment Securities (Tables)

6 Months Ended

Jun. 30, 2011

Investment Securities

Schedule of amortized cost, gross unrealized gains and losses, and fair value of investment securities

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
(dollars in thousands)	Cost		Gains		Losses		Value
June 30, 2011
Available-for-Sale:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	1,016,715	$	7,855	$	(817)	$	1,023,753
Debt Securities Issued by States and Political Subdivisions	127,790		3,174		(280)		130,684
Debt Securities Issued by Corporations	43,063		135		(1)		43,197
Mortgage-Backed Securities Issued by
Government Agencies	2,783,398		55,866		(4,213)		2,835,051
U.S. Government-Sponsored Enterprises	76,385		3,531		-		79,916
Total Mortgage-Backed Securities	2,859,783		59,397		(4,213)		2,914,967
Total	$	4,047,351	$	70,561	$	(5,311)	$	4,112,601
Held-to-Maturity:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	179,489	$	3,579	$	-	$	183,068
Mortgage-Backed Securities Issued by
Government Agencies	2,270,256		47,694		(1)		2,317,949
U.S. Government-Sponsored Enterprises	62,279		3,325		-		65,604
Total Mortgage-Backed Securities	2,332,535		51,019		(1)		2,383,553
Total	$	2,512,024	$	54,598	$	(1)	$	2,566,621
December 31, 2010
Available-for-Sale:
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	536,770	$	19,131	$	(45)	$	555,856
Debt Securities Issued by States and Political Subdivisions	113,715		1,477		(1,583)		113,609
Debt Securities Issued by U.S. Government-Sponsored Enterprises	500		5		-		505
Mortgage-Backed Securities Issued by
Government Agencies	5,696,907		84,008		(30,887)		5,750,028
U.S. Government-Sponsored Enterprises	109,259		4,617		-		113,876
Total Mortgage-Backed Securities	5,806,166		88,625		(30,887)		5,863,904
Total	$	6,457,151	$	109,238	$	(32,515)	$	6,533,874
Held-to-Maturity:
Mortgage-Backed Securities Issued by
Government Agencies	$	47,368	$	2,959	$	-	$	50,327
U.S. Government-Sponsored Enterprises	79,881		3,820		-		83,701
Total	$	127,249	$	6,779	$	-	$	134,028

Analysis of the contractual maturities of investment securities

	Amortized
(dollars in thousands)	Cost		Fair Value
Available-for-Sale:
Due in One Year or Less	$	256,617	$	257,384
Due After One Year Through Five Years	746,982		754,351
Due After Five Years Through Ten Years	80,904		82,104
Due After Ten Years	103,065		103,795
	1,187,568		1,197,634
Mortgage-Backed Securities Issued by
Government Agencies	2,783,398		2,835,051
U.S. Government-Sponsored Enterprises	76,385		79,916
Total Mortgage-Backed Securities	2,859,783		2,914,967
Total	$	4,047,351	$	4,112,601
Held-to-Maturity:
Due After One Year Through Five Years	$	179,489	$	183,068
Mortgage-Backed Securities Issued by
Government Agencies	2,270,256		2,317,949
U.S. Government-Sponsored Enterprises	62,279		65,604
Total Mortgage-Backed Securities	2,332,535		2,383,553
Total	$	2,512,024	$	2,566,621

Schedule of investment securities in an unrealized loss position

	Less Than 12 Months				12 Months or Longer					Total
			Gross				Gross					Gross
			Unrealized				Unrealized					Unrealized
(dollars in thousands)	Fair Value		Losses		Fair Value		Losses			Fair Value		Losses
June 30, 2011
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	69,999	$	(813)	$	1,065	$	(4	)	$	71,064	$	(817)
Debt Securities Issued by States and Political Subdivisions	28,745		(280)		-		-			28,745		(280)
Debt Securities Issued by Corporations	5,049		(1)		-		-			5,049		(1)
Mortgage-Backed Securities Issued by Government Agencies	479,590		(4,193)		1,527		(21		)	481,117		(4,214)
Total	$	583,383	$	(5,287)	$	2,592	$	(25	)	$	585,975	$	(5,312)
December 31, 2010
Debt Securities Issued by the U.S. Treasury and Government Agencies	$	1,366	$	(36)	$	1,204	$	(9	)	$	2,570	$	(45)
Debt Securities Issued by States and Political Subdivisions	67,754		(1,583)		-		-			67,754		(1,583)
Mortgage-Backed Securities Issued by Government Agencies	1,662,897		(30,887)		-		-			1,662,897		(30,887)
Total	$	1,732,017	$	(32,506)	$	1,204	$	(9	)	$	1,733,221	$	(32,515)