Nonvested stock, number of annual performance measurement periods

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Total Intrinsic Value

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Intrinsic Value

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options and Warrants, Exercisable, Intrinsic Value

+ References

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options and Warrants, Exercises in Period, Total Intrinsic Value

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options and Warrants, Outstanding, Intrinsic Value

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options and Warrants, Outstanding, Weighted Average Remaining Contractual Term

+ References

No definition available.

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

No definition available.

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

No definition available.

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- Definition

Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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=6415400&loc=d3e5070-113901

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- Definition

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

+ References

+ Details

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Equity Compensation Plans and Share-Based Compensation Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant	1,085,000
Share-based Compensation Arrangement by Share-based Payment Award, Options and Warrants, Additional Disclosures [Abstract]
Options and warrants outstanding, intrinsic value	$ 26,513,000
Options and warrants exercisable, intrinsic value	24,893,000
Options and warrants outstanding, weighted average remaining contractual term (years)	1 year 6 months
Options and warrants exercises in period, total intrinsic value	11,858,000	22,375,000	16,878,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]
Total compensation cost not yet recognized, nonvested stock options	527,000
Income tax benefit from exercise of stock options and warrants (value)	126,000	1,288,000	0
Stock Options and Warrants \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Stock options
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]
Weighted-average period of recognition (years)	3 years 1 month 6 days
Nonvested stock
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]
Shares issued in period		1,000
Total intrinsic value for nonvested common stock awards vested during period	2,006,000	471,000	1,469,000
Total intrinsic value for nonvested common stock awards outstanding	4,851,000
Weighted-average period of recognition (years)	1 year 7 months 6 days
Total compensation cost not yet recognized, nonvested common stock awards	$ 3,780,000
Nonvested stock \| Measurement period beginning 2014 through 2017
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]
Shares issued in period	40,000
Nonvested stock, number of annual performance measurement periods	4
Nonvested stock \| Measurement period beginning 2012 through 2015
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]
Shares issued in period			50,000
Nonvested stock \| Measurement period beginning 2013 tthrough 2016
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]
Shares issued in period			50,000