Stockholders' Equity and Stock Awards - Restricted Stock, Restricted Stock Units, and Performance Stock Units Activity (Details)	12 Months Ended
Dec. 31, 2019 $ / shares shares
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Awards outstanding, beginning balance (in shares) \| shares	75,698
Granted (in shares) \| shares	18,735
Vested (in shares) \| shares	(35,940)
Forfeited (in shares) \| shares	0
Awards outstanding, ending balance (in shares) \| shares	58,493
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Awards outstanding, weighted average grant price, beginning balance (in dollars per share) \| $ / shares	$ 22.96
Granted, weighted average grant price (in dollars per share) \| $ / shares	26.69
Vested, weighted average grant price (in dollars per share) \| $ / shares	23.31
Forfeited, weighted average grant price (in dollars per share) \| $ / shares	0
Awards outstanding, weighted average grant price, ending balance (in dollars per share) \| $ / shares	$ 23.93
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Awards outstanding, beginning balance (in shares) \| shares	443,818
Granted (in shares) \| shares	46,130
Vested (in shares) \| shares	(300,001)
Forfeited (in shares) \| shares	0
Awards outstanding, ending balance (in shares) \| shares	189,947
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Awards outstanding, weighted average grant price, beginning balance (in dollars per share) \| $ / shares	$ 19.33
Granted, weighted average grant price (in dollars per share) \| $ / shares	26.69
Vested, weighted average grant price (in dollars per share) \| $ / shares	18.00
Forfeited, weighted average grant price (in dollars per share) \| $ / shares	0
Awards outstanding, weighted average grant price, ending balance (in dollars per share) \| $ / shares	$ 23.22
Performance-based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Awards outstanding, beginning balance (in shares) \| shares	213,383
Granted (in shares) \| shares	92,264
Vested (in shares) \| shares	(41,927)
Forfeited (in shares) \| shares	(14,314)
Awards outstanding, ending balance (in shares) \| shares	249,406
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Awards outstanding, weighted average grant price, beginning balance (in dollars per share) \| $ / shares	$ 22.53
Granted, weighted average grant price (in dollars per share) \| $ / shares	26.69
Vested, weighted average grant price (in dollars per share) \| $ / shares	24.28
Forfeited, weighted average grant price (in dollars per share) \| $ / shares	23.61
Awards outstanding, weighted average grant price, ending balance (in dollars per share) \| $ / shares	$ 23.71

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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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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-Topic 718
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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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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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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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-Publisher FASB
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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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

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-Publisher FASB
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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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