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Stock-Based Compensation Unrestricted Stock Awards Activity (Details) - Unrestricted Stock
Jun. 30, 2019
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Outstanding, shares, beginning of period (shares) | shares 27,812
Outstanding and nonvested, shares, end of period (shares) | shares 27,812
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]  
Outstanding, weighted average fair value, beginning of period (usd per share) | $ / shares $ 36.84
Outstanding and nonvested, weighted average fair value, end of period (usd per share) | $ / shares $ 36.84