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Note 8. Stock Compensation Plans - Performance Share Activity (Details) - Performance Shares - $ / shares
1 Months Ended 12 Months Ended
Dec. 02, 2014
Jun. 30, 2015
Share-based Compensation Arrangements    
Performance Shares, Impact of Spin-Off 548,552  
Performance Shares, Shares Outstanding, Beginning of Period   0
Performance Shares, Shares Granted   241,222
Performance Shares, Shares Vested   0
Performance Shares, Shares Forfeited   0
Performance Shares, Shares Outstanding, End of Period   789,774
Performance Shares, Weighted Average Grant Date Fair Value of Shares Outstanding, Beginning of Period   $ 0.00
Performance Shares, Weighted Average Grant Date Fair Value of Shares Granted $ 8.43 14.47
Performance Shares, Weighted Average Grant Date Fair Value of Shares Vested   0.00
Performance Shares, Weighted Average Grant Date Fair Value of Shares Forfeited   0.00
Performance Shares, Weighted Average Grant Date Fair Value of Shares Outstanding, End of Period   $ 10.27