Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

Information pertaining to the activity in the Plan is as follows:

Obligations and funded status at December 31:

	2016			2015
	(Dollars in thousands)
Change in projected benefit obligation
Projected benefit obligation at beginning of year	$	17,177		$	18,103
Interest cost	701			680
Actuarial loss (gain)	544			(809		)
Benefits paid	(735		)	(797		)
Projected benefit obligation at end of year	17,687			17,177
Change in fair value of plan assets
Fair value of plan assets at beginning of year	15,717			17,300
Actuarial gain (loss) on plan assets	899			(786		)
Employer contributions	750			—
Benefits paid	(735		)	(797		)
Fair value of plan assets at end of year	16,631			15,717
Net liability for pension benefits	$	(1,056	)	$	(1,460	)
	2016			2015
	(Dollars in thousands)
Accumulated benefit obligation at December 31	$	17,687		$	17,177

Schedule of Net Benefit Costs [Table Text Block]

Net periodic pension benefit for 2016, 2015 and 2014 consisted of the following components:

	2016			2015			2014
	(Dollars in thousands)
Interest cost on projected benefit obligation	$	701		$	680		$	757
Expected return on plan assets	(1,036		)	(1,144		)	(1,193		)
Amortization of net actuarial loss	165			56			—
Net periodic pension benefit	$	(170	)	$	(408	)	$	(436	)

Plan Asset Allocations by Asset Category based on Fair Values [Table Text Block]

Union's Plan asset allocations at December 31, 2016 and 2015, by asset category based on their fair values, were as follows:

Asset Category	2016		2015
Cash and cash equivalents	3.4	%	3.5	%
Interest bearing deposits in banks	—	%	0.8	%
Debt securities	49.7	%	31.2	%
Equity securities	46.9	%	64.3	%
Mutual and exchange traded funds	—	%	0.2	%
Total	100.0	%	100.0	%

Plan Asset Allocation, Mix of Investments [Table Text Block]

In order to achieve this goal the investment objective is to maintain a mix of growth and income investments allocated as follows, with no more than 5% of the equity portion of the portfolio invested in one company and no fewer than 30 securities diversified by industry and sector:

Equity securities and international mutual funds	38-58%
Debt securities	40-60%
Cash and cash equivalents	0-5%

Schedule of Allocation of Plan Assets [Table Text Block]

The fair values of the Plan's investments at December 31, 2016 and 2015 , segregated by fair value hierarchy level, are summarized below:

			Fair Value Measurement
			December 31, 2016
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(Dollars in thousands)
U.S. Government	$	1,826	$	—	$	1,826	$	—
Common trust funds	5,207		5,207		—		—
Marketable equity securities:
Information technology	976		976		—		—
Financial	813		813		—		—
Industrials	1,212		1,212		—		—
Healthcare	1,393		1,393		—		—
Consumer	2,131		2,131		—		—
Energy	1,275		1,275		—		—
Mutual and exchange traded funds	1,798		1,798		—		—
Total	$	16,631	$	14,805	$	1,826	$	—

			Fair Value Measurement
			December 31, 2015
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(Dollars in thousands)
Interest bearing deposits in banks	$	131	$	—	$	131	$	—
U.S. Government	341		341		—		—
Corporate bonds	4,569		2,003		2,566		—
Marketable equity securities:
Information technology	1,544		1,544		—		—
Financial	1,368		1,368		—		—
Industrials	945		945		—		—
Healthcare	1,746		1,746		—		—
Consumer	3,346		3,346		—		—
Energy	1,154		1,154		—		—
Mutual and exchange traded funds	573		573		—		—
Total	$	15,717	$	13,020	$	2,697	$	—

Schedule of Expected Benefit Payments [Table Text Block]

The following table summarizes the estimated future benefit payments expected to be paid under the Plan:

	(Dollars in thousands)
2017	$	738
2018	762
2019	769
2020	797
2021	863
Years 2022 to 2026	4,485

Schedule of Costs of Retirement Plans [Table Text Block]

The following table summarizes employer contributions for the years ended December 31, 2016, 2015 and 2014:

	2016		2015		2014
	(Dollars in thousands)
Employer matching	$	221	$	200	$	195
Profit sharing	301		274		236
Safe harbor	294		264		262
Total	$	816	$	738	$	693