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

+ References

No definition available.

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- Definition

Term of treasury issues.

+ References

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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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.

+ References

No definition available.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Number of share instruments newly issued under a share-based compensation plan.

+ References

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- Definition

Percentage of vesting of share-based compensation awards.

+ References

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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.

+ References

+ Details

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 2
-Subparagraph (f)(2)(i)
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-Name Accounting Standards Codification
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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Stock Compensation Plans (Textual) (Details) - USD ($)	12 Months Ended
Stock Compensation Plans (Textual) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	May 02, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense recognized	$ 6,600,000	$ 6,100,000	$ 7,000,000.0
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 \| Management and Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued (in shares)	133,400
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]
Number of shares issued (in shares)	96,800
Percentage of maximum amount available for issuance	0.00%	23.00%	38.00%
TSR PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
General vesting period of options granted	3 years
Unrecognized compensation cost	$ 1,900,000
Number of shares issued (in shares)	96,800
Expected term (in years)	2 years 9 months 29 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 2014 LT Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized to grant under LT Plan (in shares)					1,750,000
Number of shares remained available (in shares)	410,000
The 2014 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 2014 LT Plan \| Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	2,300,000
The 2014 LT Plan \| EPS PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 1,000,000.0
2004 ESP \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares remained available (in shares)	51,000
Term of treasury issues	1 year