INVESTMENT SECURITIES (Tables)

6 Months Ended

Jun. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Schedule of amortized cost, gross unrealized gains and losses, and fair value of investment securities

The following tables summarize the amortized cost, gross unrealized gains and losses, and fair value of investment securities available for sale and held to maturity by major classification.

	June 30, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Securities available for sale:
GSE obligations	$	31,322	$	232	$	—	$	31,554
SBA-guaranteed securities	18,938		150		46		19,042
Mortgage-backed securities issued by GSEs	556,287		7,476		350		563,413
Municipal bonds	131,241		3,131		35		134,337
Corporate bonds	201,600		1,815		974		202,441
Collateralized loan obligations	50,516		15		255		50,276
Non-agency CMBS	25,334		180		17		25,497
Certificates of deposit	992		—		—		992
Equity securities	11,108		215		568		10,755
Total securities available for sale	$	1,027,338	$	13,214	$	2,245	$	1,038,307
Securities held to maturity:
Municipal bonds	$	38,959	$	2,238	$	—	$	41,197

	December 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Securities available for sale:
GSE obligations	$	5,980	$	3	$	1	$	5,982
SBA-guaranteed securities	12,114		74		12		12,176
Mortgage-backed securities issued by GSEs	440,654		887		5,916		435,625
Municipal bonds	55,402		504		106		55,800
Corporate bonds	123,669		551		688		123,532
Collateralized loan obligations	50,538		—		55		50,483
Non-agency RMBS	3,528		144		9		3,663
Certificates of deposit	245		—		—		245
Equity securities	2,381		33		788		1,626
Total securities available for sale	$	694,511	$	2,196	$	7,575	$	689,132
Securities held to maturity:
Municipal bonds	$	39,182	$	1,318	$	—	$	40,500

Schedule of gross unrealized losses and fair values of securities in a continuous unrealized loss position

The following tables summarize gross unrealized losses and fair values, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position. 

	Less than 12 months				12 months or more				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
June 30, 2016
Securities available for sale:
SBA-guaranteed securities	$	11,108	$	46	$	—	$	—	$	11,108	$	46
Mortgage-backed securities issued by GSEs	43,247		87		35,499		263		78,746		350
Municipal bonds	4,403		35		—		—		4,403		35
Corporate bonds	48,563		433		17,946		541		66,509		974
Collateralized loan obligations	40,219		255		—		—		40,219		255
Non-agency CMBS	8,833		17		—		—		8,833		17
Equity securities	—		—		1,631		568		1,631		568
Total temporarily impaired AFS securities	$	156,373	$	873	$	55,076	$	1,372	$	211,449	$	2,245
December 31, 2015
Securities available for sale:
GSE obligations	$	999	$	1	$	—	$	—	$	999	$	1
SBA-guaranteed securities	5,043		12		—		—		5,043		12
Mortgage-backed securities issued by GSEs	208,620		2,453		117,144		3,463		325,764		5,916
Municipal bonds	8,995		106		—		—		8,995		106
Corporate bonds	43,110		577		3,697		111		46,807		688
Collateralized loan obligations	45,471		55		—		—		45,471		55
Non-agency RMBS	—		—		901		9		901		9
Equity securities	1,411		788		—		—		1,411		788
Total temporarily impaired AFS securities	$	313,649	$	3,992	$	121,742	$	3,583	$	435,391	$	7,575

Schedule of number of investments securities in an unrealized loss position

The table below summarizes the number of investment securities in an unrealized loss position.

	June 30, 2016	December 31, 2015
Securities available for sale:
SBA-guaranteed securities	4	1
GSE obligations	—	1
Mortgage-backed securities issued by GSEs	29	83
Municipal bonds	5	9
Corporate bonds	17	15
Collateralized loan obligations	7	8
Non-agency RMBS	—	1
Equity securities	3	3
Total number of investment securities in an unrealized loss position	65	121

Schedule of amortized cost and fair value by contractual maturity

The amortized cost and fair values of securities available for sale, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. 

	June 30, 2016				December 31, 2015
	Amortized cost		Fair value		Amortized cost		Fair value
Securities available for sale:
Due within one year	$	60,349	$	60,464	$	66,591	$	67,163
Due after one year through five years	603,269		609,942		291,298		289,525
Due after five years through ten years	317,157		321,212		309,625		306,420
Due after ten years	35,455		35,934		24,616		24,398
Equity securities	11,108		10,755		2,381		1,626
	$	1,027,338	$	1,038,307	$	694,511	$	689,132
Securities held to maturity:
Due within one year	$	1,014	$	1,027	$	—	$	—
Due after one year through five years	30,164		31,488		31,421		32,272
Due after five years through ten years	4,050		4,348		4,072		4,229
Due after ten years	3,731		4,334		3,689		3,999
	$	38,959	$	41,197	$	39,182	$	40,500

The following table summarizes securities gains for the periods presented.

	Three months ended June 30,					Six months ended June 30,
	2016			2015		2016			2015
Gross gains on sales of securities available for sale	$	92		$	84	$	286		$	85
Gross losses on sales of securities available for sale	(28		)	—		(92		)	—
Total securities gains	$	64		$	84	$	194		$	85