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Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2017	$ 171	$ 24	$ 137,242	$ 293	$ 157,471	$ 295,201
Effect of adoption of ASU 2014-09 at Mar. 31, 2018					4,417	4,417
Other comprehensive income				671		671
Stock-based employee compensation expense			826			826
Issuance of restricted shares			(18)			(18)
Balance at Mar. 31, 2018	$ 171	$ 24	$ 138,050	$ 964	$ 162,479	$ 301,688

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Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Value of stock related to Restricted Stock Awards issued during the period, net of the stock value of such awards forfeited.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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