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Note 6. Credit Facilities Covenant Textuals (Details) - Jun. 30, 2015 - Primary Credit Facility $ in Millions	USD ($)
Line of Credit Facility, Commitment Fee Basis Points, Minimum	20.0
Line of Credit Facility, Commitment Fee Basis Points, Maximum	25.0
Adjusted Leverage Ratio, Indebtedness Reduction For Excess Cash	$ 15
Adjusted Leverage Ratio Covenant	3.0
Fixed Charge Coverage Ratio Covenant	1.10