Note 5. Employee Benefit Plans Qualified Pension Plan Investment Strategy (Details)	6 Months Ended	12 Months Ended
Jun. 30, 2014	Dec. 31, 2013
Fixed Income Securities [Member]
Defined Benefit Plan, Target Plan Asset Allocations	75.00%	69.00%
Equity Securities [Member]
Defined Benefit Plan, Target Plan Asset Allocations	24.00%	31.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan, Target Plan Asset Allocations	1.00%

Target allocation of investments of this type to total plan assets presented on a weighted average basis.

Reference 1: 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=28361610&loc=d3e1928-114920

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=28361610&loc=d3e2446-114920

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