Securities (Tables)

6 Months Ended

Jun. 30, 2019

Investments, Debt and Equity Securities [Abstract]

The book values and approximate fair values of investment securities at June 30, 2019 and December 31, 2018 are summarized as follows:



($ in thousands)	June 30, 2019						December 31, 2018
	Amortized Cost		Fair Value	Unrealized			Amortized Cost	Fair Value	Unrealized
	Amortized Cost		Fair Value	Gains	(Losses)		Amortized Cost	Fair Value	Gains	(Losses)
Securities available for sale:
Government-sponsored enterprise securities	$	59,202	59,477	313	(38	)	82,995	82,662	63	(396	)
Mortgage-backed securities	593,824		598,024	7,088	(2,888	)	396,995	385,551	39	(11,483	)
Corporate bonds	33,731		34,470	869	(130	)	33,751	33,138	76	(689	)
Total available for sale	$	686,757	691,971	8,270	(3,056	)	513,741	501,351	178	(12,568	)

Securities held to maturity:
Mortgage-backed securities	$	46,447	45,998	—	(449	)	52,048	50,241	—	(1,807	)
State and local governments	32,603		33,046	444	(1	)	49,189	49,665	525	(49	)
Total held to maturity	$	79,050	79,044	444	(450	)	101,237	99,906	525	(1,856	)

Schedule of Unrealized Losses on Investment Securities

The following table presents information regarding securities with unrealized losses at June 30, 2019:



($ in thousands)	Securities in an Unrealized Loss Position for Less than 12 Months			Securities in an Unrealized Loss Position for More than 12 Months		Total
	Fair Value		Unrealized Losses	Fair Value	Unrealized Losses	Fair Value	Unrealized Losses
Government-sponsored enterprise securities	$	—	—	13,962	38	13,962	38
Mortgage-backed securities	—		—	276,614	3,337	276,614	3,337
Corporate bonds	—		—	870	130	870	130
State and local governments	—		—	946	1	946	1
Total temporarily impaired securities	$	—	—	292,392	3,506	292,392	3,506

The following table presents information regarding securities with unrealized losses at December 31, 2018:



($ in thousands)	Securities in an Unrealized Loss Position for Less than 12 Months			Securities in an Unrealized Loss Position for More than 12 Months		Total
	Fair Value		Unrealized Losses	Fair Value	Unrealized Losses	Fair Value	Unrealized Losses
Government-sponsored enterprise securities	$	4,921	78	13,682	318	18,603	396
Mortgage-backed securities	82,525		351	294,305	12,939	376,830	13,290
Corporate bonds	20,704		433	5,817	256	26,521	689
State and local governments	595		1	6,641	48	7,236	49
Total temporarily impaired securities	$	108,745	863	320,445	13,561	429,190	14,424

Schedule of Contractual Maturity of Investment Securities

The book values and approximate fair values of investment securities at June 30, 2019, by contractual maturity, are summarized in the table below. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties.



	Securities Available for Sale			Securities Held to Maturity
($ in thousands)	Amortized Cost		Fair Value	Amortized Cost	Fair Value
Securities
Due within one year	$	—	—	1,165	1,169
Due after one year but within five years	77,691		78,421	22,463	22,813
Due after five years but within ten years	10,242		10,473	8,110	8,165
Due after ten years	5,000		5,053	865	899
Mortgage-backed securities	593,824		598,024	46,447	45,998
Total securities	$	686,757	691,971	79,050	79,044