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SHARE-BASED COMPENSATION PLANS - Narrative (Detail) - USD ($)		12 Months Ended
	Aug. 30, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares purchased by employees		25,834
2011 Incentive Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of common stock reserved to be issued		381,920
Number of shares available to be issued		136,951
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of common stock reserved to be issued		350,000
Number of shares available to be issued		186,004
Tax benefits		$ 6,000	$ 3,000	$ 4,000
Maximum shares employees may purchase as a percent of their annual salary		10.00%
Percentage of value of the shares on the semi-annual offering	85.00%	95.00%
Number of shares purchased by employees		6,334	6,305	6,707
Weighted average price (in dollars per share)		$ 16.64	$ 15.83	$ 14.88
Compensation expense recognized		$ 17,000	$ 8,000	$ 12,000
Restricted stock awards | 2011 Incentive Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense recognized for restricted stock awards		941,000	732,000	178,000
Tax benefits		320,000	256,000	62,000
Total fair value of shares vested		237,000	43,000	$ 0
Unrecognized compensation expense related to restricted stock awards		$ 2,169,000	2,293,000
Weighted-average recognition period		2 years 5 months 1 day
Stock options | 2011 Incentive Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum term of options		10 years
Intrinsic value of outstanding and exercisable options		$ 39,000	$ 0

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Aggregate number of common shares reserved for future issuance.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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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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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Weighted average purchase price of capital shares purchased through an employee stock ownership plan.

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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 highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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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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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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