Investment Securities (Tables)

12 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Schedule of marketable securities

Investment securities at December 31, 2014 and December 31, 2013 were as follows:

(In thousands)	Amortized Cost		Gross Unrealized/Unrecognized Holding Gains		Gross Unrealized/Unrecognized Holding Losses		Estimated Fair Value
2014:
Securities Available-for-Sale
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
2014:
Securities Held-to-Maturity
U.S. Government sponsored entities’ asset-backed securities	$	140,562	$	3,088	$	160	$	143,490
Total	$	140,562	$	3,088	$	160	$	143,490

(In thousands)	Amortized Cost		Gross Unrealized/Unrecognized Holding Gains		Gross Unrealized/Unrecognized Holding Losses		Estimated Fair Value
2013:
Securities Available-for-Sale
Obligations of U.S. Treasury and other U.S. Government sponsored entities	$	570,632	$	—	$	45,496	$	525,136
U.S. Government sponsored entities’ asset-backed securities	650,391		8,070		9,990		648,471
Other equity securities	1,120		1,539		—		2,659
Total	$	1,222,143	$	9,609	$	55,486	$	1,176,266
2013:
Securities Held-to-Maturity
Obligations of states and political subdivisions	$	240	$	1	$	—	$	241
U.S. Government sponsored entities’ asset-backed securities	181,821		5,382		42		187,161
Total	$	182,061	$	5,383	$	42	$	187,402

Schedule of unrealized loss on investments

The following table provides detail on investment securities with unrealized losses aggregated by investment category and length of time the individual securities had been in a continuous loss position at December 31, 2014 and December 31, 2013:

	Less than 12 Months				12 Months or Longer				Total
(In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
2014:
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
2014:
Securities Held-to-Maturity
U.S. Government sponsored entities’ asset-backed securities	$	8,032	$	148	$	2,714	$	12	$	10,746	$	160

	Less than 12 Months				12 Months or Longer				Total
(In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
2013:
Securities Available-for-Sale
Obligations of U.S. Treasury and other U.S. Government sponsored entities	$	377,626	$	29,256	$	147,510	$	16,240	$	525,136	45,496
U.S. Government sponsored entities' asset-backed securities	404,035		8,917		21,572		1,073		425,607		9,990
Total	$	781,661	$	38,173	$	169,082	$	17,313	$	950,743	$	55,486
2013:
Securities Held-to-Maturity
U.S. Government sponsored entities' asset-backed securities	$	5,781	$	42	$	—	$	—	$	5,781	$	42

Schedule of contractual maturity of debt securities

The amortized cost and estimated fair value of investments in debt securities at December 31, 2014, 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 in principal repayments.

(In thousands)	Amortized Cost		Estimated Fair Value		Weighted Average Yield
Securities Available-for-Sale
U.S. Treasury and other U.S. Government sponsored entities’ notes:
Due one through five years	30,000		30,011		2.10	%
Due five through ten years	516,886		508,053		2.35	%
Total	$	546,886	$	538,064	2.34	%
U.S. Government sponsored entities’ asset-backed securities	$	751,974	$	761,153	2.36	%
Securities Held-to-Maturity
U.S. Government sponsored entities’ asset-backed securities	$	140,562	$	143,490	3.58	%