Treasury Stock: (Details) - Jun. 30, 2015 - USD ($) $ in Millions |
Total |
---|---|
Treasury stock purchase plan [Abstract] | |
Treasury Stock Purchase Plan | $ 40.0 |
Treasury Stock Purchase Plan Remaining Available | $ 22.5 |
Shares Paid for Tax Withholding for Share Based Compensation | 16,401 |
Payments Related to Tax Withholding for Share-based Compensation | $ 1.4 |