INVESTMENTS IN DEBT AND EQUITY SECURITIES (Tables)

9 Months Ended

Sep. 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 September 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
(dollars in thousands)	or Less			Years		Years		10 Years			Gains	Losses		Value
September 30, 2014:
Carrying value:
U.S. Government sponsored agencies	$	8,355		29,981		20,125		155,035		213,496	3,989	(292	)	217,193	1.33	%
Residential mortgage-backed	270			65,773		43,199		914,904		1,024,146	14,034	(10,613	)	1,027,567	2.37
Commercial mortgage-backed	—			782		—		—		782	55	—		837	4.95
State and political subdivisions	1,612			838		—		28,387		30,837	74	—		30,911	1.15
Corporate notes	11,961			109,536		57,998		—		179,495	4,345	(505	)	183,335	2.81
Equity investments	—			—		—		1,750		1,750	—	(41	)	1,709	2.10
Total	$	22,198		206,910		121,322		1,100,076		1,450,506	22,497	(11,451	)	1,461,552	2.25
Fair value:
Debt securities	$	22,430		211,554		121,748		1,104,111
Equity securities	—			—		—		1,709
Total	$	22,430		211,554		121,748		1,105,820
Weighted average yield	2.54		%	2.27	%	2.27	%	2.23	%
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 September 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
(dollars in thousands)	or Less			Years		Years		10 Years			Gains	Losses		Value
September 30, 2014:
Carrying value:
U.S. Government sponsored agencies	$	—		—		11,713		—		11,713	—	(77	)	11,636	1.22	%
Residential mortgage-backed	—			133,567		52,574		467,145		653,286	1,247	(10,580	)	643,953	1.89
State and political subdivisions	521			820		489		1,002		2,832	1	(79	)	2,754	1.84
Total	$	521		134,387		64,776		468,147		667,831	1,248	(10,736	)	658,343	1.88
Fair value:
Debt securities	$	521		133,995		64,713		459,114
Weighted average yield	2.62		%	1.88	%	1.12	%	1.98	%
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 nine months ended September 30, 2014 and 2013 were as follows:

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
(dollars in thousands)	2014			2013		2014		2013
Gross realized gains on sales of available-for-sale securities	$	—		110		2,010		802
Gross realized losses on sales of available-for-sale securities	—			—		(730	)	(354	)
Other-than-temporary impairment	(1		)	(2	)	(2	)	(411	)
Net realized (loss) gain on investment securities	$	(1	)	108		1,278		37

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 September 30, 2014 and December 31, 2013, were as follows:

	Less Than 12 Months				12 Months or More			Total
(dollars in thousands)	Fair Value		Unrealized Losses		Fair Value	Unrealized Losses		Fair Value	Unrealized Losses
September 30, 2014:
Available for sale:
U.S. Government sponsored agencies	$	24,573	(273	)	14,707	(19	)	39,280	(292	)
Residential mortgage-backed	179,472		(1,076	)	259,445	(9,537	)	438,917	(10,613	)
Corporate notes	12,079		(421	)	9,916	(84	)	21,995	(505	)
Equity investments	1,709		(41	)	—	—		1,709	(41	)
Total	$	217,833	(1,811	)	284,068	(9,640	)	501,901	(11,451	)
Held to maturity:
U.S. Government sponsored agencies	$	11,636	(77	)	—	—		11,636	(77	)
Residential mortgage-backed	179,822		(1,651	)	342,062	(8,929	)	521,884	(10,580	)
State and political subdivisions	512		(3	)	926	(76	)	1,438	(79	)
Total	$	191,970	(1,731	)	342,988	(9,005	)	534,958	(10,736	)
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	)