Percentage of maximum amount available for issuance.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Measurement Period

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- Definition

Term of treasury issues.

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- Definition

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

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-Name Accounting Standards Codification
-Topic 718
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- Definition

Amount of cost not yet recognized for nonvested award 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

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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Percentage of vesting of award under share-based payment arrangement.

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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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- Definition

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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Stock Compensation Plans (Textual) (Details) - USD ($)	12 Months Ended
Stock Compensation Plans (Textual) (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	May 02, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense recognized	$ 16,200,000	$ 6,600,000	$ 6,100,000
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
General vesting period of options granted	3 years
Restricted Stock Awards \| Year 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting rights, percentage	33.33%
Restricted Stock Awards \| Year 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting rights, percentage	33.33%
Restricted Stock Awards \| Year 3
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting rights, percentage	33.33%
EPS PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
General vesting period of options granted	3 years
EPS PSUs \| Management
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of maximum amount available for issuance	50.00%	18.00%	0.00%
TSR PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
General vesting period of options granted	3 years
Unrecognized compensation cost	$ 2,600,000
Expected term (in years)	2 years 10 months 2 days	2 years 9 months 29 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	1 year	1 year	1 year
The 2019 LT Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized to grant under LT Plan (in shares)					2,300,000
Number of shares remained available (in shares)	2,500,000
The 2019 LT Plan \| Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of awards	7 years
General vesting period of options granted	3 years
Expected volatility measurement period				5 years 6 months
Unrecognized compensation cost	$ 0
Expected term (in years)				5 years 6 months
The 2019 LT Plan \| Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	8,200,000
The 2019 LT Plan \| EPS PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 1,400,000
2004 ESP \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized to grant under LT Plan (in shares)	230,000
Number of shares remained available (in shares)	230,000
Term of treasury issues	1 year
Lansing Trade Group, LLC (b)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense recognized	$ 9,400,000