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Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in-Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Beginning Balance at Dec. 31, 2017	$ 239,411	$ 1,321	$ 94,384	$ 168,752	$ (25,046)
Beginning Balance, shares at Dec. 31, 2017		13,205
Issuance of restricted stock awards		$ 7	(7)
Issuance of restricted stock awards, shares		68
Exercise of stock options	6	$ 6
Exercise of stock options, shares		60
Shares withheld related to net share settlement	(318)	$ (5)	(313)
Shares withheld related to net share settlement, shares		(39)
Share-based compensation	1,208		1,208
Net income	8,644			8,644
Ending Balance at Mar. 31, 2018	248,951	$ 1,329	95,272	177,396	(25,046)
Ending Balance, shares at Mar. 31, 2018		13,294
Beginning Balance at Dec. 31, 2018	$ 279,161	$ 1,332	98,778	204,097	(25,046)
Beginning Balance, shares at Dec. 31, 2018		13,323
Issuance of restricted stock awards		$ 16	(16)
Issuance of restricted stock awards, shares		161
Exercise of stock options, shares	0
Shares withheld related to net share settlement	$ (450)	$ (1)	(449)
Shares withheld related to net share settlement, shares		(19)
Share-based compensation	997		997
Net income	8,108			8,108
Ending Balance at Mar. 31, 2019	$ 287,816	$ 1,347	$ 99,310	$ 212,205	$ (25,046)
Ending Balance, shares at Mar. 31, 2019		13,465

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The amount of adjustment to stockholders' equity associated with an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

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

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

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