Common Stock, Stock Dividend Paid, Percentage

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Deferred fees

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Defined Benefit Plan, Annual Vesting Percentage

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Defined Benefit Plan, Benefit Obligation, Percent Of Average Executive Base Salary

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Defined Benefit Plan, Benefit Obligation, Percent Of Average Executive Base Salary, Adjustment Thereafter

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- Definition

Defined Benefit Plan, Number of Annual Payments After Separation

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Defined Benefit Plan, Payment Term After Separation

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- Definition

Interest paid on deferred fees

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No definition available.

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Options Exercised Forfeited Or Expired Number

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No definition available.

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Share Based Compensation Arrangement By ShareBased Payment Award Award Expiration Period

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- Definition

Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.15(a))
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-Section S99
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- Definition

Commitment made to pay deferred cash remuneration expressed as a percentage of the individual's base salary.

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No definition available.

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- Definition

The amount of distributions made to the individual during the period.

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- Definition

The interest rate used to adjust for the time value of money for the plan.

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- Definition

1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6522206

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-Name Accounting Standards Codification
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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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No definition available.

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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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- Definition

Face value (death benefits) of the life insurance policies underlying the life settlement contracts accounted for under the fair value method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Life Settlement Contract
-URI http://asc.fasb.org/extlink&oid=6516907

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-SubTopic 30
-Section 50
-Paragraph 8
-Subparagraph (c)
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- Definition

Period expense related to postemployment benefits.

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No definition available.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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-Name Accounting Standards Codification
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- Definition

Percentage of vesting of share-based compensation awards.

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Number of share options (or share units) exercised during the current period.

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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Significant Accounting Policies - Narrative (Details)	3 Months Ended		6 Months Ended
Significant Accounting Policies - Narrative (Details)	Jun. 30, 2017 USD ($) shares	Jun. 30, 2016 USD ($) shares	Jun. 30, 2017 USD ($) payment shares	Jun. 30, 2016 USD ($) shares	Dec. 31, 2016 USD ($) shares	Sep. 30, 2016	Aug. 26, 2016	Dec. 31, 2015 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock dividend, percentage	10.00%		10.00%			10.00%	10.00%
Options, outstanding (in shares) \| shares	552,570		552,570		552,759
Number of options exercised \| shares	29,618	20,378	46,682	20,378
Defined contribution plan, maximum annual contributions per employee, percent			80.00%
Defined contribution plan employer discretionary contribution amount	$ 138,000	$ 90,000	$ 257,000	$ 179,000
Deferred fees	6,000	5,000	126,000	107,000
Interest paid on deferred fees	12,000	9,000	21,000	16,000
Distributions paid	0	0	0	0
Defined benefit plans future payments	$ 1,095,000	973,000	$ 1,095,000	973,000	$ 1,023,000			$ 923,000
Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred compensation arrangement guaranteed award percentage			100.00%
Executive Management
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred compensation arrangement guaranteed award percentage			100.00%
Supplemental Employee Retirement Plan \| President And Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of average executive base salary	40.00%		40.00%
Payment term after separation			36 months
Percent of average executive base salary, adjustment thereafter	2.00%		2.00%
Number of annual payments after separation \| payment			15
Defined benefit plans future payments	$ 3,400,000		$ 3,400,000
Discount rate used to calculate the present value of the benefit obligation	4.00%		4.00%
Vesting percentage			3.00%
Award vesting rights, percentage			100.00%
Other Postretirement Benefit Plan \| Executive Management
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred compensation arrangement guaranteed award percentage			7.50%
Award vesting rights, percentage			100.00%
Accrued expense under the plan	$ 45,000		$ 45,000
Life insurance plan with a post retirement death benefit	250,000		250,000
Life insurance plan aggregate expenses	$ 1,000	$ 1,000	$ 3,000	$ 2,000
Other Postretirement Benefit Plan \| Executive Management \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred compensation arrangement guaranteed award percentage			15.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
Options, award expiration period			10 years
Number of shares authorized \| shares	2,462,585		2,462,585
Options, outstanding (in shares) \| shares	552,570		552,570
Options, exercised forfeited or expired (shares) \| shares			1,527,643
Number of shares available for grant \| shares	382,372		382,372
Compensation cost not yet recognized	$ 500,000		$ 500,000
Compensation cost recognition weighted average period			2 years 1 month 6 days
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			4 years
Number of shares authorized \| shares	518,157		518,157
Number of shares available for grant \| shares	111,404		111,404
Compensation cost recognition weighted average period			3 years
Nonvested awards, compensation not yet recognized, awards other than options	$ 1,100,000		$ 1,100,000