Share based compensation arrangement by share based payment award number of common stock reserved for issuance.

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- Definition

Share based compensation arrangement by share based payment award option awards contractual term.

+ 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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
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- Definition

The amount of expense, net of income tax, 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

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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-Publisher FASB
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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ 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.

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-Publisher FASB
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- Definition

Date the equity-based award expires, in CCYY-MM-DD format.

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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

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

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

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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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No definition available.

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended			56 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	May 09, 2012
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Options granted (in shares)	0
Stock repurchase program authorized share amount (in shares)	15,000,000			15,000,000
Common stock repurchased (in shares)		2,000		11,521,000
Common stock repurchased, value				$ 335,455
Total intrinsic value of options exercised	$ 10,571	$ 7,252	$ 6,613
Weighted average remaining life	4 years 10 months 17 days
Stock options plans
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Recognized stock-based compensation costs	$ 40	209	865
Recognized stock-based compensation costs, net of tax	24	131	548
Pre-tax unrecognized compensation expense	$ 4			4
Weighted average remaining life	1 month 24 days
Restricted stock units (RSUs)
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Recognized stock-based compensation costs	$ 35,019	32,343	27,016
Recognized stock-based compensation costs, net of tax	21,250	$ 20,832	$ 10,735
Pre-tax unrecognized compensation expense	$ 27,917			$ 27,917
Recognized expense over a weighted-average period, years	1 year 7 months 9 days
2012 long-term incentive plan
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)					3,200,000
Expiration year	Dec. 31, 2022
2012 long-term incentive plan \| Stock options plans
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Option awards contractual term (years)	10 years
2012 long-term incentive plan \| Maximum \| Stock options plans
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Vesting period (years)	5 years
2012 long-term incentive plan \| Maximum \| Restricted stock units (RSUs)
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Vesting period (years)	5 years
2012 long-term incentive plan \| Minimum \| Stock options plans
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Vesting period (years)	3 years
2012 long-term incentive plan \| Minimum \| Restricted stock units (RSUs)
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Vesting period (years)	3 years
Non-employee director
Share Based Compensation Arrangement by Share Based Payment Award [Line Items]
Options granted (in shares)	1,000	1,000	0