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Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Statutory federal income tax rate	35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State income taxes, net of federal tax benefit	3.70%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	3.70%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	4.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Domestic production activities deduction	(4.60%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther	(2.70%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther	(3.00%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther
Other items	(1.60%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.50%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments	1.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective income tax rate	32.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations	36.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations	37.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319



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-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h)(2))

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Subparagraph 2

-Article 4

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

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-Paragraph 1

-Subparagraph (SAB TOPIC 6.I)

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other deductions.

+ References

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