Investment Securities (Tables)

12 Months Ended

Dec. 31, 2016

Investments Debt And Equity Securities [Abstract]

Available for Sale and Held to Maturity Investment

The amortized cost of investment securities and the approximate fair value at December 31, 2016 and 2015 were as follows:

SUMMARY OF INVESTMENT SECURITIES

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
December 31, 2016
Available for sale:
U.S. Treasury securities	$	2,498	$	—	$	—		$	2,498
U.S. Government agency securities		—		—		—			—
U.S. Government agency mortgage-backed securities		246,535		583		(2,574	)		244,544
Other mortgage-backed securities		115		—		(1	)		114
Trust preferred securities		12,023		—		(2,172	)		9,851
Collateralized loan obligations		37,471		8		(160	)		37,319
Other securities		1,386		—		(26	)		1,360
Total available for sale		300,028		591		(4,933	)		295,686
Held to maturity:
Other securities		250		—		—			250
Total held to maturity		250		—		—			250
Total investment securities	$	300,278	$	591	$	(4,933	)	$	295,936
December 31, 2015
Available for sale:
U.S. Treasury securities	$	2,494	$	—	$	(10	)	$	2,484
U.S. Government agency securities		4,976		—		(74	)		4,902
U.S. Government agency mortgage-backed securities		205,586		1,082		(1,156	)		205,512
Other mortgage-backed securities		183		—		(1	)		182
Trust preferred securities		12,018		—		(1,844	)		10,174
Collateralized loan obligations		59,956		—		(960	)		58,996
Other securities		625		—		—			625
Total available for sale		285,838		1,082		(4,045	)		282,875
Held to maturity:
Other securities		250		—		—			250
Total held to maturity		250		—		—			250
Total investment securities	$	286,088	$	1,082	$	(4,045	)	$	283,125

Gross Unrealized Losses by Investment Category

The following table provides the gross unrealized losses and fair value, aggregated by investment category and length of time the individual securities have been in a continuous unrealized loss position at December 31, 2016 and 2015:

GROSS UNREALIZED LOSSES BY INVESTMENT CATEGORY

	Less than 12 Months					12 Months or Longer					Total
	Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses
December 31, 2016
U.S. Government agency mortgage-backed securities	$	108,070	$	(1,683	)	$	54,643	$	(891	)	$	162,713	$	(2,574	)
Other mortgage-backed securities		—		—			114		(1	)		114		(1	)
Trust preferred securities		—		—			9,851		(2,172	)		9,851		(2,172	)
Collateralized loan obligations		—		—			33,825		(160	)		33,825		(160	)
Other securities		975		(26	)		—		—			975		(26	)
Total	$	109,045	$	(1,709	)	$	98,433	$	(3,224	)	$	207,478	$	(4,933	)
December 31, 2015
U.S. Treasury securities	$	2,484	$	(10	)	$	—	$	—		$	2,484	$	(10	)
U.S. Government agency securities		—		—			4,902		(74	)		4,902		(74	)
U.S. Government agency mortgage-backed securities		56,753		(254	)		27,028		(902	)		83,781		(1,156	)
Other mortgage-backed securities		182		(1	)		—		—			182		(1	)
Trust preferred securities		—		—			10,175		(1,844	)		10,175		(1,844	)
Collateralized loan obligations		12,864		(135	)		46,133		(825	)		58,997		(960	)
Total	$	72,283	$	(400	)	$	88,238	$	(3,645	)	$	160,521	$	(4,045	)

Contractual Maturities of Investment Securities

The amortized cost and estimated fair value of the Company’s investment securities at December 31, 2016, by contractual maturity, is shown below. Actual maturities will differ from contractual maturities as borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

CONTRACTUAL MATURITIES OF INVESTMENT SECURITIES

	Available for Sale				Held to Maturity
December 31, 2016	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	2,635	$	2,635	$	250	$	250
Due after one year through five years		248		248		—		—
Due after five years through ten years		37,471		37,319		—		—
Due after ten years		13,024		10,826		—		—
Total investment securities, excluding mortgage- backed    securities		53,378		51,028		250		250
U.S. Government agency mortgage-backed securities		246,535		244,544		—		—
Other mortgage-backed securities		115		114		—		—
Total investment securities	$	300,028	$	295,686	$	250	$	250