Attributes of employees contribution to defined contribution plan.

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- Definition

Average duration of plan assets investment in bonds.

+ Details

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- Definition

Base pay contributed to the plan.

+ Details

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- Details

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- Definition

Employees retirement age for health care and life insurance benefits unfunded defined benefit post-retirement plan.

+ Details

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- Details

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- Definition

Life insurance coverage, maximum.

+ Details

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- Definition

The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement.

+ Details

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- Definition

The minimum period that the individual is required to perform services in order to be fully vested under the deferred compensation arrangement.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64, 65, A240

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

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

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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.

+ Details

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- Definition

Target allocation percentage of investments in debt securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph d(2)

-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 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)(i)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2446-114920

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(i)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

+ Details

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- Definition

Target allocation percentage of investments in equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

+ Details

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Benefit Plans (Details Textuals) (USD $)	9 Months Ended
Benefit Plans (Details Textuals) (USD $)	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, Percentage	100.00%	100.00%	100.00%
Benefit Plans (Textuals) [Abstract]
Contribution to plan	$ 50,000,000
Employees retirement age for health care and life insurance benefits under unfunded defined benefit post-retirement plan	55 years
Employees vesting service under defined benefit post-retirement plan, minimum	10 years
Life insurance coverage, maximum	$ 50,000
Average duration of plan assets investment in bonds, years	3.6Y
Target allocation of plan assets in equity, percentage	69.00%
Target allocation of plan assets in bonds, percentage	31.00%
Base pay contributed to the plan	up to the first 3%
Attributes of employees contribution to defined contribution plan	Half of the employee contribution was matched on the 4th and 5th percent of base pay contributed to the Plan
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, Percentage	63.00%
Covered Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, Percentage	37.00%