Investments (Tables)

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale and Held-to-Maturity Securities Reconciliation

The following table presents the amortized cost, gross unrealized gains and losses and fair value of securities available for sale and held to maturity:

	December 31, 2015
(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available for sale securities:
Obligations of U.S. Government-sponsored enterprises	$	98,699	$	309	$	—		$	99,008
Obligations of states and political subdivisions	40,700		1,343		(342		)	41,701
Agency mortgage-backed securities	311,516		2,046		(2,501		)	311,061
Total securities available for sale	$	450,915	$	3,698	$	(2,843	)	$	451,770
Held to maturity securities:
Obligations of states and political subdivisions	$	14,831	$	63	$	(50	)	$	14,844
Agency mortgage-backed securities	28,883		—		(286		)	28,597
Total securities held to maturity	$	43,714	$	63	$	(336	)	$	43,441
	December 31, 2014
(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available for sale securities:
Obligations of U.S. Government-sponsored enterprises	$	91,355	$	624	$	(153	)	$	91,826
Obligations of states and political subdivisions	33,997		1,300		(416		)	34,881
Agency mortgage-backed securities	271,430		3,577		(1,568		)	273,439
Total securities available for sale	$	396,782	$	5,501	$	(2,137	)	$	400,146
Held to maturity securities:
Obligations of states and political subdivisions	$	14,900	$	—	$	(325	)	$	14,575
Agency mortgage-backed securities	31,085		150		(15		)	31,220
Total securities held to maturity	$	45,985	$	150	$	(340	)	$	45,795

Schedule of Available-for-sale and Held-to-Maturity Securities Reconciliation

The following table presents the amortized cost, gross unrealized gains and losses and fair value of securities available for sale and held to maturity:

	December 31, 2015
(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available for sale securities:
Obligations of U.S. Government-sponsored enterprises	$	98,699	$	309	$	—		$	99,008
Obligations of states and political subdivisions	40,700		1,343		(342		)	41,701
Agency mortgage-backed securities	311,516		2,046		(2,501		)	311,061
Total securities available for sale	$	450,915	$	3,698	$	(2,843	)	$	451,770
Held to maturity securities:
Obligations of states and political subdivisions	$	14,831	$	63	$	(50	)	$	14,844
Agency mortgage-backed securities	28,883		—		(286		)	28,597
Total securities held to maturity	$	43,714	$	63	$	(336	)	$	43,441
	December 31, 2014
(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available for sale securities:
Obligations of U.S. Government-sponsored enterprises	$	91,355	$	624	$	(153	)	$	91,826
Obligations of states and political subdivisions	33,997		1,300		(416		)	34,881
Agency mortgage-backed securities	271,430		3,577		(1,568		)	273,439
Total securities available for sale	$	396,782	$	5,501	$	(2,137	)	$	400,146
Held to maturity securities:
Obligations of states and political subdivisions	$	14,900	$	—	$	(325	)	$	14,575
Agency mortgage-backed securities	31,085		150		(15		)	31,220
Total securities held to maturity	$	45,985	$	150	$	(340	)	$	45,795

Investments Classified by Contractual Maturity Date

The amortized cost and estimated fair value of debt securities at December 31, 2015, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. The weighted average life of the mortgage-backed securities is approximately 4 years.

	Available for sale				Held to maturity
(in thousands)	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	3,199	$	3,225	$	—	$	—
Due after one year through five years	121,522		122,673		4,641		4,662
Due after five years through ten years	11,141		11,543		10,190		10,182
Due after ten years	3,537		3,268		—		—
Mortgage-backed securities	311,516		311,061		28,883		28,597
	$	450,915	$	451,770	$	43,714	$	43,441

Schedule of Unrealized Loss on Investments

The following table represents a summary of investment securities that had an unrealized loss:

	December 31, 2015
	Less than 12 months				12 months or more				Total
(in thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. Government-sponsored enterprises	$	—	$	—	$	—	$	—	$	—	$	—
Obligations of states and political subdivisions	2,199		12		9,395		380		11,594		392
Agency mortgage-backed securities	189,229		2,050		21,020		737		210,249		2,787
	$	191,428	$	2,062	$	30,415	$	1,117	$	221,843	$	3,179
	December 31, 2014
	Less than 12 months				12 months or more				Total
(in thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. Government-sponsored enterprises	$	5,399	$	10	$	24,852	$	143	$	30,251	$	153
Obligations of states and political subdivisions	16,827		343		5,349		398		22,176		741
Agency mortgage-backed securities	26,367		56		97,054		1,527		123,421		1,583
	$	48,593	$	409	$	127,255	$	2,068	$	175,848	$	2,477

Schedule of Realized Gain (Loss)

The gross gains and losses realized from sales of available for sale investment securities were as follows:

	December 31,
(in thousands)	2015			2014		2013
Gross gains realized	$	63		$	—	$	1,477
Gross losses realized	(40		)	—		(182		)
Proceeds from sales	41,069			—		159,604