Investment Securities (Tables)

6 Months Ended

Jun. 30, 2015

Investments, Debt and Equity Securities [Abstract]

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 June 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	$	596,887	$	—	$	7,968	$	588,919
U.S. Government sponsored entities' asset-backed securities	770,895		11,419		3,675		778,639
Other equity securities	1,120		1,587		—		2,707
Total	$	1,368,902	$	13,006	$	11,643	$	1,370,265



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	$	121,527	$	2,152	$	133	$	123,546

Schedule Of Unrealized Loss On Securities

Securities with unrealized losses at June 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 agencies	$	376,247	$	3,753	$	212,672	$	4,215	$	588,919	$	7,968
U.S. Government agencies' asset-backed securities	$	193,222	$	849	$	126,347	$	2,826	$	319,569	$	3,675
Total	$	569,469	$	4,602	$	339,019	$	7,041	$	908,488	$	11,643
Securities Held-to-Maturity
U.S. Government sponsored entities' asset-backed securities	$	18,841	$	20	$	7,931	$	113	$	26,772	$	133

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 June 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		Weighted Avg Yield
U.S. Treasury and sponsored entities' obligations:
Due one through five years	100,000		99,911		1.05	%
Due five through ten years	496,887		489,008		2.36	%
Total	$	596,887	$	588,919	2.14	%


U.S. Government sponsored entities' asset-backed securities:	$	770,895	$	778,639	2.32	%



Securities Held-to-Maturity (In thousands)	Amortized cost		Fair value		Weighted Avg Yield
U.S. Government sponsored entities' asset-backed securities	$	121,527	$	123,546	3.52	%