INVESTMENTS IN DEBT AND EQUITY SECURITIES (Tables)

6 Months Ended

Jun. 30, 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 June 30, 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)
June 30, 2014:
Carrying value:
U.S. Government sponsored agencies	$	8,387		30,019		20,130		131,208		189,744	4,201	(52	)	193,893	1.36	%
Residential mortgage-backed	281			57,182		53,163		912,855		1,023,481	16,996	(9,141	)	1,031,336	2.34
Commercial mortgage-backed	—			786		—		—		786	65	—		851	4.95
State and political subdivisions	1,815			842		—		28,402		31,059	58	(364	)	30,753	1.17
Corporate notes	—			121,324		45,130		—		166,454	5,142	(441	)	171,155	2.81
Equity investments	—			—		—		1,750		1,750	—	(45	)	1,705	2.09
Total	$	10,483		210,153		118,423		1,074,215		1,413,274	26,462	(10,043	)	1,429,693	2.24
Fair value:
Debt securities	$	10,531		216,141		119,237		1,082,079
Equity securities	—			—		—		1,705
Total	$	10,531		216,141		119,237		1,083,784
Weighted average yield	2.03		%	2.34	%	2.08	%	2.24	%
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 June 30, 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)
June 30, 2014:
Carrying value:
U.S. Government sponsored agencies	$	—		—		12,959		—		12,959	—	(104	)	12,855	1.18	%
Residential mortgage-backed	—			120,167		70,482		487,645		678,294	1,776	(9,817	)	670,253	1.88
State and political subdivisions	521			820		489		1,002		2,832	16	(87	)	2,761	1.84
Total	$	521		120,987		83,930		488,647		694,085	1,792	(10,008	)	685,869	1.87
Fair value:
Debt securities	$	524		121,704		83,820		479,821
Weighted average yield	2.62		%	1.94	%	1.15	%	1.97	%
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 and six months ended June 30, 2014 and 2013 were as follows:

	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2014			2013		2014		2013
	(dollars expressed in thousands)
Gross realized gains on sales of available-for-sale securities	$	—		346		2,010		692
Gross realized losses on sales of available-for-sale securities	—			—		(730	)	(354	)
Other-than-temporary impairment	(1		)	(1	)	(1	)	(409	)
Net realized (loss) gain on investment securities	$	(1	)	345		1,279		(71	)

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 June 30, 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)
June 30, 2014:
Available for sale:
U.S. Government sponsored agencies	$	—	—		14,670	(52	)	14,670	(52	)
Residential mortgage-backed	85,433		(434	)	264,814	(8,707	)	350,247	(9,141	)
State and political subdivisions	—		—		28,038	(364	)	28,038	(364	)
Corporate notes	9,873		(127	)	14,686	(314	)	24,559	(441	)
Equity investments	1,705		(45	)	—	—		1,705	(45	)
Total	$	97,011	(606	)	322,208	(9,437	)	419,219	(10,043	)
Held to maturity:
U.S. Government sponsored agencies	$	12,855	(104	)	—	—		12,855	(104	)
Residential mortgage-backed	67,802		(914	)	377,479	(8,903	)	445,281	(9,817	)
State and political subdivisions	—		—		915	(87	)	915	(87	)
Total	$	80,657	(1,018	)	378,394	(8,990	)	459,051	(10,008	)
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	)