Number Of Classes Of Stock

No definition available.

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- Definition

The number of shares acquired per day under a share repurchase program.

+ References

No definition available.

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- Definition

Equity impact of the cost of shares that were repurchased during the period, excluding those repurchased from a related party. Recorded using the cost method.

+ References

No definition available.

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- Definition

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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- 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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No definition available.

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- Definition

Face amount or stated value per share of common stock.

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- Definition

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

+ References

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- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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- Definition

Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition.

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No definition available.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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- Definition

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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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

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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- Definition

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 non-vested options outstanding.

+ References

No definition available.

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- Definition

Weighted average grant-date fair value of non-vested options outstanding.

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No definition available.

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- Definition

Number of options vested.

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No definition available.

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- Definition

Weighted average grant-date fair value of options vested.

+ References

No definition available.

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- Definition

Aggregate value of stock related to Restricted Stock Awards issued during the period.

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- Definition

Amount of stock repurchase plan authorized.

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No definition available.

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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Amount remaining of a stock repurchase plan authorized.

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No definition available.

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Stockholders' Equity - Narrative (Details)											3 Months Ended		9 Months Ended	12 Months Ended
Stockholders' Equity - Narrative (Details)	Jan. 24, 2017 USD ($) shares	Apr. 08, 2016 USD ($) shares	Oct. 30, 2015 USD ($) shares	Aug. 04, 2015 USD ($) shares	Aug. 03, 2015 USD ($)	May 13, 2015 USD ($) shares	May 04, 2015 USD ($)	Feb. 11, 2015 shares	Jan. 22, 2015 USD ($) shares	Jan. 20, 2015 shares	Mar. 31, 2017 class	Mar. 31, 2016 USD ($)	Sep. 30, 2017 $ / shares	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Apr. 07, 2016 shares	Jan. 12, 2016 USD ($)	Jul. 28, 2015 USD ($)	Dec. 31, 2014 $ / shares shares	Aug. 13, 2012 shares
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares																0				23,984
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares																23,984
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value \| $ / shares																$ 1.37
Number of classes of stock \| class											2
Preferred stock, shares authorized														5,000,000	5,000,000
Preferred stock, par value (in dollars per share) \| $ / shares														$ 0.001	$ 0.001
Common stock, shares authorized														50,000,000	50,000,000
Common stock, par value (in dollars per share) \| $ / shares														$ 0.001	$ 0.001
Authorized amount of shares to be repurchased \| $							$ 5,000,000.0											$ 70,000,000.0	$ 15,000,000.0
Treasury stock, purchase price \| $			$ 3,600,000		$ 3,500,000		$ 3,500,000
Repurchase of common stock (in shares)			106,264	162,442		186,519									903,031
Repurchase of common stock \| $			$ 5,000,000.0	$ 5,000,000.0		$ 5,000,000.0									$ 23,704,000	$ 16,071,000
Remaining authorized repurchase amount \| $														$ 32,000,000.0
Number of shares authorized to be repurchased																					100,000
Allocated Share-based Compensation Expense \| $														$ 35,000	$ 104,000	$ 86,000
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost \| $												$ 64,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant														2,393,873
Stock Issued During Period, Value, Restricted Stock Award, Gross \| $	$ 1,400,000	$ 1,700,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value \| $ / shares																$ 0				$ 1.37
George K. Broady
Class of Stock [Line Items]
Repurchase of common stock (in shares)									91,817
Repurchase of common stock \| $									$ 1,100,000
Shares repurchased per trading day									5,000
Restricted Stock [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number														0	22,348	44,712				0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value \| $ / shares														$ 12.15	$ 12.15	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares															$ 12.15
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	56,260	51,015						6,116		60,960						67,076
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period														(21,930)	(22,364)	(22,364)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value \| $ / shares													$ 12.15	$ 12.15	$ 12.15
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period														(418)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value \| $ / shares														$ 12.28
Equity Incentive 2016 Plan [Member] \| Restricted Stock [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number														58,032	38,256	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value \| $ / shares														$ 28.72	$ 34.13	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares														$ 25.44	$ 34.13
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period														56,260	51,015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period														(35,336)	(12,759)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value \| $ / shares														$ 29.58	$ 34.13
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period														(1,148)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value \| $ / shares														$ 28.55
Common Stock \| Equity Incentive 2016 Plan [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized																	2,500,000