Additional compensation expense.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Awards, Share Price Threshold for Performance Criteria

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No definition available.

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Awards, Threshold Consecutive Trading Days

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Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Number of Simulations Used

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Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Valuation Period

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No definition available.

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Share-based Compensation Arrangement by Share-based Payment Award, Maximum Annual Purchase Per Employee

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Awards, Units Earned as a Percent of Units Awarded

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No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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- Definition

The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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- Definition

Amount of cost for defined contribution plan.

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-Topic 715
-SubTopic 70
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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

Amount of cost to be recognized for option under share-based payment arrangement.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

Discount rate from fair value on purchase date that participants pay for shares.

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-Publisher FASB
-Name Accounting Standards Codification
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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).

+ References

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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 estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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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

Number of shares authorized for issuance under share-based payment arrangement.

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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

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

Gross number of share options (or share units) granted during the period.

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No definition available.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

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No definition available.

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Benefit Plans - Additional Information (Details) $ / shares in Units, $ in Thousands					12 Months Ended
	Feb. 11, 2019 $ / shares shares	Aug. 10, 2018 shares	May 14, 2018 $ / shares	May 24, 2016 shares	Dec. 31, 2019 USD ($) simulation $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2010 shares	May 15, 2018 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expense recognized					$ 3,000	$ 2,700	$ 2,500
Intrinsic value of options exercised					$ 785	$ 3,500	$ 1,500
Shares, granted (in shares) \| shares					0	0	0
Employees \| Deferred Bonus
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense					$ 7,200	$ 632	$ 3,200
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense					1,600	$ 1,700	$ 1,700
Unrecognized compensation costs, stock options					$ 4,200
Unrecognized compensation costs period recognized					2 years 7 months 2 days
Market Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs period recognized					3 years 7 days
Granted (in shares) \| shares	500,000				500,000	485,000	233,791
Shares granted, weighted average grand date fair value (in dollars per share) \| $ / shares					$ 8.81
Number of days share price must be maintained					20 days
Units earned as a percent of units awarded					100.00%
Number of simulations used \| simulation \| simulation					100,000
Measurement period	10 years
Risk free interest rate	2.62%
Expected volatility rate	37.60%
Expected dividend rate	0.78%
Additional compensation expense					$ 543
Compensation expense					7,900	$ 4,900	$ 5,000
Unrecognized compensation costs					14,800
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense					2,200	$ 2,600	$ 741
Unrecognized compensation costs, stock options					$ 8,700
Unrecognized compensation costs period recognized						4 years 8 months 19 days
Granted (in shares) \| shares					164,828
Shares granted, weighted average grand date fair value (in dollars per share) \| $ / shares					$ 17.00
Market RSU Granted on May 14, 2018 \| One Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	10 years		7 years
Granted (in shares) \| shares	75,000
Share price threshold for performance criteria (in dollars per share) \| $ / shares			$ 48.00
Number of days share price must be maintained	20 days
Market RSU Granted on August 10, 2018 \| Eleven Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	10 years	7 years
Shares, granted (in shares) \| shares		410,000
Minimum \| Market Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price threshold for performance criteria (in dollars per share) \| $ / shares					34.00
Expected term	4 years 6 months
Minimum \| Market RSU Granted on May 14, 2018 \| One Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price threshold for performance criteria (in dollars per share) \| $ / shares	$ 35.00
Maximum \| Market Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price threshold for performance criteria (in dollars per share) \| $ / shares					$ 55.00
Expected term	5 years 9 months 18 days
Maximum \| Market RSU Granted on May 14, 2018 \| One Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price threshold for performance criteria (in dollars per share) \| $ / shares	$ 48.00
2015 Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common voting shares authorized (in shares) \| shares				7,000,000
Options or restricted shares of expiration period				10 years
Percentage of fair market value of common stock				100.00%
2015 Omnibus Plan \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common voting shares authorized (in shares) \| shares									8,750,000
2015 Omnibus Plan \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares) \| shares					164,828	840,150	340,318
Shares granted, weighted average grand date fair value (in dollars per share) \| $ / shares					$ 17.00	$ 19.72	$ 17.00
2015 Omnibus Plan \| Market Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares) \| shares						485,000	233,791
Shares granted, weighted average grand date fair value (in dollars per share) \| $ / shares						$ 7.93	$ 13.94
2015 Omnibus Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				3 years
Restricted Stock Plan \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period								7 years
Shares available for issuance to eligible employees (in shares) \| shares								1,350,000
A2015 Omnibus Plan Amendedand Restated \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares) \| shares						355,150	106,527
Shares granted, weighted average grand date fair value (in dollars per share) \| $ / shares						$ 25.17	$ 23.71
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum annual purchase per employee					$ 25
Purchase date discount					15.00%
Share-based compensation expense					$ 77	$ 60	$ 79