Maintained per share dividend amount paid periodically by the Company

No definition available.

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- Definition

The number of equity-based instruments increased due to exceeding the targeted performance conditions of a grant.

+ References

No definition available.

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The initial grant date target number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. Does not include adjustment for exceeding/not meeting performance criteria of the grant.

+ References

No definition available.

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- Definition

Fair value of grants made during the period under stock option plans.

+ References

No definition available.

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- Definition

Vesting Percentage For Stock based Award Target Achievement

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No definition available.

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- Definition

Vesting Range

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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)
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-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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- Definition

Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 2
-Subparagraph (j)
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-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

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

+ References

+ Details

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- Definition

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

+ References

+ Details

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

+ Details

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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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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.

+ References

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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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=6415400&loc=d3e5070-113901

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- Definition

Percentage of vesting of share-based compensation awards.

+ References

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

+ References

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- Definition

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

+ References

No definition available.

+ Details

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Number of share options (or share units) exercised during the current period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
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Share-Based Compensation and Capital Stock Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share-Based Compensation and Capital Stock [Line Items]
Stock options granted, shares	0	0	745,769	500,000
Stock options granted, fair value			$ 6,900	$ 6,200
Aggregate intrinsic value of stock options, outstanding	$ 10,400		10,400
Aggregate intrinsic value of stock options, exercisable	10,100		10,100
Intrinsic value of stock options exercised	2,400	$ 900	6,800	9,500
Proceeds from exercise of stock options	$ 2,600	$ 700	$ 6,802	$ 6,381
Stock options exercised (in shares)	104,442	30,808	297,398	263,600
Share-based compensation expense	$ 3,100	$ 3,400	$ 11,000	$ 9,100
Periodic dividend (in dollars per share)			$ 0.205
Cash dividends declared per share (in dollars per share)	$ 0.205	$ 0.195	$ 0.615	$ 0.585
Dividends declared	$ 11,500		$ 34,600
Common stock purchased under stock repurchase program (in shares)	100,000		600,000
Stock Repurchased During Period, Value	$ 5,600		$ 28,600
Shares redeemed for tax withholding for share based compensation (in shares)	1,284		118,063
Payments related to tax withholding for share-based compensation	$ 61		$ 5,400
Performance Vested Restricted Stock Units
Share-Based Compensation and Capital Stock [Line Items]
Grants vested (in shares)	0	0	28,188	42,326
Grants vested, total fair value				$ 1,500
Grants vested, initial target (in shares)				38,476
Grants vested, performance percentage achieved				110.00%
Restricted shares forfeited (in shares)	26,363	6,079	54,556	6,079
Increase in shares due to performance percentage achieved (in shares)			2,043	3,850
Share-based compensation expense	$ 400	$ 1,000	$ 1,700	$ 1,600
Dividends declared			$ 100
Performance Vested Restricted Stock Units \| Tranche One
Share-Based Compensation and Capital Stock [Line Items]
Grants vested (in shares)			6,126
Grants vested, total fair value			$ 200
Grants vested, initial target (in shares)			4,083
Grants vested, performance percentage achieved			150.00%
Increase in shares due to performance percentage achieved (in shares)			2,043
Performance Vested Restricted Stock Units \| Tranche Two
Share-Based Compensation and Capital Stock [Line Items]
Grants vested (in shares)			22,062
Grants vested, total fair value			$ 800
Grants vested, initial target (in shares)			44,118
Grants vested, performance percentage achieved			50.00%
Restricted shares forfeited (in shares)			22,056
Increase in shares due to performance percentage achieved (in shares)			2,043
Performance Vested Restricted Stock Units \| Minimum
Share-Based Compensation and Capital Stock [Line Items]
Vesting range (percentage)			0.00%
Award targets currently estimated to be achieved (percentage)			0.00%
Performance Vested Restricted Stock Units \| Maximum
Share-Based Compensation and Capital Stock [Line Items]
Vesting range (percentage)			200.00%
Award targets currently estimated to be achieved (percentage)			175.00%
Stock options
Share-Based Compensation and Capital Stock [Line Items]
Share-based compensation expense	1,000	800	$ 3,600	2,400
Restricted stock
Share-Based Compensation and Capital Stock [Line Items]
Grants vested (in shares)			149,318
Grants vested, total fair value	$ 180	$ 553	$ 7,363	$ 12,292
Restricted shares forfeited (in shares)	14,072	9,522	23,686	17,964
Share-based compensation expense	$ 1,700	$ 1,600	$ 5,700	$ 5,100
Adjustment \| Performance Vested Restricted Stock Units
Share-Based Compensation and Capital Stock [Line Items]
Share-based compensation expense		$ 400		$ 200
Officer \| Performance Vested Restricted Stock Units
Share-Based Compensation and Capital Stock [Line Items]
Share-based compensation expense			100
Officer \| Stock options
Share-Based Compensation and Capital Stock [Line Items]
Share-based compensation expense			400
Officer \| Restricted stock
Share-Based Compensation and Capital Stock [Line Items]
Share-based compensation expense			$ 400