INVESTMENTS IN DEBT AND EQUITY SECURITIES (Tables)

3 Months Ended

Mar. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

The amortized cost, contractual maturity, gross unrealized gains and losses and fair value of investment securities available for sale at March 31, 2014 and December 31, 2013 were as follows:

	Maturity									Total Amortized Cost	Gross				Weighted Average Yield
	1 Year			1-5		5-10		After			Unrealized			Fair
	or Less			Years		Years		10 Years			Gains	Losses		Value
	(dollars expressed in thousands)
March 31, 2014:
Carrying value:
U.S. Government sponsored agencies	$	8,418		30,058		20,136		132,248		190,860	4,281	(47	)	195,094	1.37	%
Residential mortgage-backed	282			28,277		82,445		891,319		1,002,323	13,662	(12,540	)	1,003,445	2.37
Commercial mortgage-backed	—			—		789		—		789	62	—		851	4.95
State and political subdivisions	1,367			1,681		200		28,417		31,665	67	(392	)	31,340	1.23
Corporate notes	5,000			121,153		45,131		—		171,284	5,066	(599	)	175,751	2.82
Equity investments	—			—		—		1,750		1,750	—	(59	)	1,691	2.13
Total	$	15,067		181,169		148,701		1,053,734		1,398,671	23,138	(13,637	)	1,408,172	2.26
Fair value:
Debt securities	$	15,135		186,936		148,797		1,055,613
Equity securities	—			—		—		1,691
Total	$	15,135		186,936		148,797		1,057,304
Weighted average yield	2.21		%	2.39	%	2.10	%	2.26	%
December 31, 2013:
Carrying value:
U.S. Government sponsored agencies	$	8,450		40,243		88,666		135,679		273,038	3,525	(664	)	275,899	1.34	%
Residential mortgage-backed	—			43,943		115,731		951,454		1,111,128	12,873	(18,214	)	1,105,787	2.32
Commercial mortgage-backed	—			—		793		—		793	63	—		856	4.94
State and political subdivisions	1,369			2,035		200		28,432		32,036	81	(560	)	31,557	1.26
Corporate notes	4,980			140,575		45,132		—		190,687	5,777	(261	)	196,203	2.69
Equity investments	—			—		—		1,500		1,500	—	(57	)	1,443	2.17
Total	$	14,799		226,796		250,522		1,117,065		1,609,182	22,319	(19,756	)	1,611,745	2.18
Fair value:
Debt securities	$	14,927		233,338		250,860		1,111,177
Equity securities	—			—		—		1,443
Total	$	14,927		233,338		250,860		1,112,620
Weighted average yield	2.17		%	2.23	%	1.81	%	2.24	%

Held-to-maturity Securities [Table Text Block]

The amortized cost, contractual maturity, gross unrealized gains and losses and fair value of investment securities held to maturity at March 31, 2014 and December 31, 2013 were as follows:

	Maturity									Total Amortized Cost	Gross				Weighted Average Yield
	1 Year			1-5		5-10		After			Unrealized			Fair
	or Less			Years		Years		10 Years			Gains	Losses		Value
	(dollars expressed in thousands)
March 31, 2014:
Carrying value:
U.S. Government sponsored agencies	$	—		—		14,373		—		14,373	—	(135	)	14,238	1.16	%
Residential mortgage-backed	—			79,836		115,139		507,272		702,247	622	(14,101	)	688,768	1.91
State and political subdivisions	445			574		—		1,033		2,052	1	(82	)	1,971	1.63
Total	$	445		80,410		129,512		508,305		718,672	623	(14,318	)	704,977	1.89
Fair value:
Debt securities	$	445		80,347		128,038		496,147
Weighted average yield	2.85		%	2.01	%	1.42	%	2.00	%
December 31, 2013:
Carrying value:
U.S. Government sponsored agencies	$	—		—		16,119		—		16,119	—	(153	)	15,966	1.14	%
Residential mortgage-backed	—			16,327		182,933		522,504		721,764	441	(21,206	)	700,999	1.88
State and political subdivisions	640			575		55		1,033		2,303	2	(87	)	2,218	1.93
Total	$	640		16,902		199,107		523,537		740,186	443	(21,446	)	719,183	1.86
Fair value:
Debt securities	$	642		16,926		195,647		505,968
Weighted average yield	3.32		%	2.20	%	1.53	%	1.97	%

Schedule of Realized Gain (Loss) [Table Text Block]

Gross realized gains and gross realized losses on investment securities for the three months ended March 31, 2014 and 2013 were as follows:

	Three Months Ended
	March 31,
	2014			2013
	(dollars expressed in thousands)
Gross realized gains on sales of available-for-sale securities	$	2,010		346
Gross realized losses on sales of available-for-sale securities	(730		)	(354	)
Other-than-temporary impairment	—			(408	)
Net realized gain (loss) on investment securities	$	1,280		(416	)

Schedule of Unrealized Loss on Investments [Table Text Block]

Gross unrealized losses on investment securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2014 and December 31, 2013, were as follows:

	Less Than 12 Months				12 Months or More			Total
	Fair Value		Unrealized Losses		Fair Value	Unrealized Losses		Fair Value	Unrealized Losses
	(dollars expressed in thousands)
March 31, 2014:
Available for sale:
U.S. Government sponsored agencies	$	—	—		14,670	(47	)	14,670	(47	)
Residential mortgage-backed	355,453		(11,046	)	25,617	(1,494	)	381,070	(12,540	)
State and political subdivisions	28,025		(392	)	—	—		28,025	(392	)
Corporate notes	19,826		(173	)	9,574	(426	)	29,400	(599	)
Equity investments	1,691		(59	)	—	—		1,691	(59	)
Total	$	404,995	(11,670	)	49,861	(1,967	)	454,856	(13,637	)
Held to maturity:
U.S. Government sponsored agencies	$	14,238	(135	)	—	—		14,238	(135	)
Residential mortgage-backed	551,649		(10,990	)	84,920	(3,111	)	636,569	(14,101	)
State and political subdivisions	1,041		(82	)	—	—		1,041	(82	)
Total	$	566,928	(11,207	)	84,920	(3,111	)	651,848	(14,318	)
December 31, 2013:
Available for sale:
U.S. Government sponsored agencies	$	16,005	(664	)	—	—		16,005	(664	)
Residential mortgage-backed	511,617		(18,119	)	5,473	(95	)	517,090	(18,214	)
State and political subdivisions	27,872		(560	)	—	—		27,872	(560	)
Corporate notes	9,959		(41	)	4,780	(220	)	14,739	(261	)
Equity investments	1,443		(57	)	—	—		1,443	(57	)
Total	$	566,896	(19,441	)	10,253	(315	)	577,149	(19,756	)
Held to maturity:
U.S. Government sponsored agencies	$	15,966	(153	)	—	—		15,966	(153	)
Residential mortgage-backed	644,700		(20,759	)	10,527	(447	)	655,227	(21,206	)
State and political subdivisions	946		(87	)	—	—		946	(87	)
Total	$	661,612	(20,999	)	10,527	(447	)	672,139	(21,446	)