Deferred Compensation Benefits - Two (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
ESBP
Defined Benefit Plan Disclosure [Line Items]
2013	$ 697
2014	739
2015	725
2016	659
2017	640
2018-2022	2,943
Total	6,403
NDBP
Defined Benefit Plan Disclosure [Line Items]
2013	137
2014	155
2015	159
2016	177
2017	200
2018-2022	1,460
Total	$ 2,288

Defined Benefit Plan, Expected Future Benefit Payments, Total

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- Definition

Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

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- Definition

Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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- Definition

Amount of benefits expected to be paid in the fifth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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- Definition

Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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- Definition

Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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- Definition

Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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