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Equity Compensation Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands					1 Months Ended	12 Months Ended
	Feb. 12, 2016	May. 14, 2015	Feb. 18, 2015	May. 14, 2014	Jan. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Jul. 29, 2013	Apr. 05, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized						300,000,000	300,000,000
Shares issued to Directors									3,000
Share price						$ 7.51	$ 9.31
Stock compensation expense						$ 495	$ 206
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock granted in period			100,000		40,000	112,000	49,000
Share price			$ 9.35		$ 8.20
Options grant date value			$ 935		$ 328	$ 221
Awards vesting period			3 years		3 years
Unearned compensation cost						558
Restricted Stock | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock granted in period	210,000
Share price	$ 6.22
Options grant date value	$ 1,306
Awards vesting period	3 years
SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted			300,000		80,000
Options grant date value			$ 219		$ 49
Stock appreciation rights (SAR,s) expiration date					Feb. 18, 2020
Intrinsic value exercisable						0
Intrinsic value outstanding						0
Unearned compensation cost						$ 121
Directors Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock granted, shares		12,000		9,000
Stock granted, value		$ 107		$ 81
Stock granted, stock price		$ 8.89		$ 8.95
Amended and Restated Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized								800,000

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Share based compensation arrangement by share based payment award equity instruments other than options grant date fair value.

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Share based compensation arrangement by share based payment award options grants in period weighted average grant date fair value amount.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements payable within one year (or the operating cycle, if longer).

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The shares or units in an ESOP trust that have been assigned to individual participant accounts based on a known formula. IRS rules require allocations to be nondiscriminatory generally based on compensation, length of service, or a combination of both. For any particular participant such shares or units may be vested, unvested, or partially vested.

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Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

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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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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Date the equity-based award expires, in CCYY-MM-DD format.

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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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Net number of share options (or share units) granted during the period.

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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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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Number of shares of capital stock issued (purchased by employees) in connection with an employee stock ownership plan.

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Aggregate value of stock issued during the period as a result of employee stock ownership plan (ESOP).

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