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Stock Option And Stock Award Plans (Summary Of Additional Information On Stock Options Outstanding And Exercisable) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Shares | shares	881,513
Options Outstanding, Weighted Average, Remaining Contractual Life (Years)	3 years 9 months 19 days
Options Outstanding, Weighted Average, Exercise Price	$ 20.22
Options Outstanding, Aggregate Intrinsic Value | $	$ 0
Options Exercisable, Shares | shares	771,000
Options Exercisable, Weighted Average Exercise Price	$ 19.84
Options Exercisable, Aggregate Intrinsic Value | $	$ 0
- To 15.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 0
Range of Exercise Prices, Maximum	$ 15
Options Outstanding, Shares | shares	0
Options Outstanding, Weighted Average, Remaining Contractual Life (Years)	0 years
Options Outstanding, Weighted Average, Exercise Price	$ 0.00
Options Outstanding, Aggregate Intrinsic Value | $	$ 0
Options Exercisable, Shares | shares	0
Options Exercisable, Weighted Average Exercise Price	$ 0.00
Options Exercisable, Aggregate Intrinsic Value | $	$ 0
15.01 To 17.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 15.01
Range of Exercise Prices, Maximum	$ 17.5
Options Outstanding, Shares | shares	164,500
Options Outstanding, Weighted Average, Remaining Contractual Life (Years)	1 year 1 month 6 days
Options Outstanding, Weighted Average, Exercise Price	$ 17.13
Options Outstanding, Aggregate Intrinsic Value | $	$ 0
Options Exercisable, Shares | shares	164,500
Options Exercisable, Weighted Average Exercise Price	$ 17.13
Options Exercisable, Aggregate Intrinsic Value | $	$ 0
17.51 To 20.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 17.51
Range of Exercise Prices, Maximum	$ 20
Options Outstanding, Shares | shares	424,330
Options Outstanding, Weighted Average, Remaining Contractual Life (Years)	2 years 3 months 20 days
Options Outstanding, Weighted Average, Exercise Price	$ 19.02
Options Outstanding, Aggregate Intrinsic Value | $	$ 0
Options Exercisable, Shares | shares	410,155
Options Exercisable, Weighted Average Exercise Price	$ 19.00
Options Exercisable, Aggregate Intrinsic Value | $	$ 0
20.01 To 25.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 20.01
Range of Exercise Prices, Maximum	$ 25
Options Outstanding, Shares | shares	289,033
Options Outstanding, Weighted Average, Remaining Contractual Life (Years)	7 years 4 months 26 days
Options Outstanding, Weighted Average, Exercise Price	$ 23.62
Options Outstanding, Aggregate Intrinsic Value | $	$ 0
Options Exercisable, Shares | shares	194,095
Options Exercisable, Weighted Average Exercise Price	$ 23.78
Options Exercisable, Aggregate Intrinsic Value | $	$ 0
25.01 To 30.01
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 25.01
Range of Exercise Prices, Maximum	$ 30.01
Options Outstanding, Shares | shares	3,650
Options Outstanding, Weighted Average, Remaining Contractual Life (Years)	5 years 10 months 25 days
Options Outstanding, Weighted Average, Exercise Price	$ 30.01
Options Outstanding, Aggregate Intrinsic Value | $	$ 0
Options Exercisable, Shares | shares	2,250
Options Exercisable, Weighted Average Exercise Price	$ 30.01
Options Exercisable, Aggregate Intrinsic Value | $	$ 0

X

- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable.

+ 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 (e)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ 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 (c)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Weighted average remaining contractual term of outstanding stock options, 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
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