Schedule Of Restricted Stock Award and Restricted Stock Unit Activity (Details) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Restricted Stock Awards [Member]
Schedule of Restricted Stock Award and Restricted Stock Unit Activity [Line Items]
Nonvested beginning balance	327,503	518,346	355,509	571,175
Granted	21,590	18,813	21,590	18,813
Vested	(61,006)	(144,499)	(78,212)	(179,478)
Forfeited or expired		(9,250)	(10,800)	(27,100)
Nonvested ending balance	288,087	383,410	288,087	383,410
Weighted average grant date fair value beginning balance	$ 13.22	$ 12.00	$ 13.37	$ 11.87
Weighted average grant date fair value of granted	$ 16.56	$ 16.48	$ 16.56	$ 16.48
Weighted average grant date fair value of vested	$ 12.68	$ 8.48	$ 14.57	$ 8.71
Weighted average grant date fair value of forfeited or expired		$ 12.51	$ 12.51	$ 12.51
Weighted average grant date fair value ending balance	$ 13.32	$ 13.53	$ 13.32	$ 13.53
Restricted Stock Units [Member]
Schedule of Restricted Stock Award and Restricted Stock Unit Activity [Line Items]
Nonvested beginning balance	2,449,544	1,576,561	1,414,661	711,980
Granted	157,097	13,500	1,563,114	888,559
Vested	(92,297)	(105,241)	(286,984)	(105,241)
Forfeited or expired	(58,330)	(19,105)	(234,777)	(29,583)
Nonvested ending balance	2,456,014	1,465,715	2,456,014	1,465,715
Weighted average grant date fair value beginning balance	$ 17.06	$ 21.28	$ 20.61	$ 23.43
Weighted average grant date fair value of granted	$ 15.88	$ 16.10	$ 15.04	$ 19.42
Weighted average grant date fair value of vested	$ 25.35	$ 24.48	$ 22.53	$ 24.48
Weighted average grant date fair value of forfeited or expired	$ 16.89	$ 21.82	$ 22.27	$ 21.27
Weighted average grant date fair value ending balance	$ 16.72	$ 21.00	$ 16.72	$ 21.00

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

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ 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)(2)(iii)(1)

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-Publisher FASB

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-Number 123R

-Paragraph A240

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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

-Publisher FASB

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-Topic 718

-SubTopic 10

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Paragraph A240

-Subparagraph b(2)(a)

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ 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)(2)(i)-(ii)

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

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(a)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

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

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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