Stockholders' Equity - Changes in Stockholder's Equity (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019
Beginning balance	$ 115,038	$ 74,742
Beginning balance (in shares)	30,512,843
Share-based compensation expense	$ 761	673
Total comprehensive income	$ 10,924	10,985
Ending balance (in shares)	30,512,843
Ending balance	$ 126,651	86,400
Common Stock
Beginning balance	$ 318	$ 304
Beginning balance (in shares)	30,513,000	30,219,000
Ending balance (in shares)	30,513,000	30,219,000
Ending balance	$ 318	$ 304
Treasury Stock
Beginning balance	(10,245)	(9,114)
Ending balance	(10,245)	(9,114)
Additional Paid In Capital
Beginning balance	243,007	239,870
Share-based compensation expense	761	673
Ending balance	243,768	240,543
Retained Deficit
Beginning balance	(70,571)	(115,083)
Total comprehensive income	11,130	9,853
Ending balance	(59,513)	(105,230)
Accumulated Other Comp. Loss
Beginning balance	(47,471)	(41,235)
Total comprehensive income	(206)	1,132
Ending balance	$ (47,677)	$ (40,103)
Adoption of ASU 842
Cumulative effect of adoption of Topic 842			$ (72)
Adoption of ASU 842 \| Retained Deficit
Cumulative effect of adoption of Topic 842			$ (72)

Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interests

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- Definition

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

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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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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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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