Investment Securities (Tables)

9 Months Ended

Sep. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule Of Investment Securities

Investment securities at December 31, 2014, were as follows:

Securities Available-for-Sale (In thousands)	Amortized Cost		Gross Unrealized Holding  Gains		Gross Unrealized Holding  Losses		Estimated  Fair Value
Obligations of U.S. Treasury and other U.S. Government sponsored entities	$	546,886	$	11	$	8,833	$	538,064
U.S. Government sponsored entities' asset-backed securities	751,974		13,421		4,242		761,153
Other equity securities	1,120		1,578		—		2,698
Total	$	1,299,980	$	15,010	$	13,075	$	1,301,915

Securities Held-to-Maturity (In thousands)	Amortized Cost		Gross Unrealized Holding  Gains		Gross Unrealized Holding  Losses		Estimated Fair Value
U.S. Government sponsored entities' asset-backed securities	$	140,562	$	3,088	$	160	$	143,490

Investment securities at September 30, 2015, were as follows:

Securities Available-for-Sale (In thousands)	Amortized Cost		Gross Unrealized Holding  Gains		Gross Unrealized Holding  Losses		Estimated  Fair Value
Obligations of U.S. Treasury and other U.S. Government sponsored entities	$	546,888	$	260	$	2,097	$	545,051
U.S. Government sponsored entities' asset-backed securities	734,014		13,766		2,000		745,780
Other equity securities	1,120		1,513		—		2,633
Total	$	1,282,022	$	15,539	$	4,097	$	1,293,464

Securities Held-to-Maturity (In thousands)	Amortized Cost		Gross Unrealized Holding  Gains		Gross Unrealized Holding  Losses		Estimated Fair Value
U.S. Government sponsored entities' asset-backed securities	$	111,415	$	2,110	$	82	$	113,443
Obligations of states and political subdivisions	$	6,094	$	48	$	—	$	6,142
Total	$	117,509	$	2,158	$	82	$	119,585

Schedule Of Unrealized Loss On Securities

Securities with unrealized losses at September 30, 2015, were as follows:

	Unrealized loss position for less than 12 months				Unrealized loss position for 12 months or longer				Total
(In thousands)	Fair value		Unrealized losses		Fair value		Unrealized losses		Fair value		Unrealized losses
Securities Available-for-Sale
Obligations of U.S. Treasury and other U.S. Government sponsored entities	$	179,452	$	548	$	215,339	$	1,549	$	394,791	$	2,097
U.S. Government sponsored entities' asset-backed securities	$	—	$	—	$	121,059	$	2,000	$	121,059	$	2,000
Total	$	179,452	$	548	$	336,398	$	3,549	$	515,850	$	4,097
Securities Held-to-Maturity
U.S. Government sponsored entities' asset-backed securities	$	—	$	—	$	7,899	$	82	$	7,899	$	82

Securities with unrealized losses at December 31, 2014, were as follows:

	Unrealized loss position for less than 12 months				Unrealized loss position for 12 months or longer				Total
(In thousands)	Fair value		Unrealized losses		Fair value		Unrealized losses		Fair value		Unrealized losses
Securities Available-for-Sale
Obligations of U.S. Treasury and other U.S. Government sponsored entities	$	119,913	$	87	$	388,140	$	8,746	$	508,053	$	8,833
U.S. Government sponsored entities' asset-backed securities	73,276		136		170,430		4,106		243,706		4,242
Total	$	193,189	$	223	$	558,570	$	12,852	$	751,759	$	13,075
Securities Held-to-Maturity
U.S. Government sponsored entities' asset-backed securities	$	8,032	$	148	$	2,714	$	12	$	10,746	$	160

Amortized Cost And Estimated Fair Value Of Investments In Debt Securities By Contractual Maturity

The amortized cost and estimated fair value of investments in debt securities at September 30, 2015, are shown in the following table by contractual maturity or the expected call date, except for asset-backed securities, which are shown as a single total, due to the unpredictability of the timing of principal repayments.

Securities Available-for-Sale (In thousands)	Amortized cost		Fair value		Tax equivalent yield
U.S. Treasury and sponsored entities' obligations:
Due within one year	150,000		150,257		1.39	%
Due five through ten years	396,888		394,794		2.43	%
Total	$	546,888	$	545,051	2.14	%
U.S. Government sponsored entities' asset-backed securities:	$	734,014	$	745,780	2.31	%

Securities Held-to-Maturity (In thousands)	Amortized cost		Fair value		Tax equivalent yield
Obligations of state and political subdivisions:
Due five through ten years	$	6,094	$	6,142	5.03	%
Total	$	6,094	$	6,142	5.03	%
U.S. Government sponsored entities' asset-backed securities	$	111,415	$	113,443	3.49	%