Stock-based Compensation Plans (Tables) |
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| Share-based Payment Arrangement, Noncash Expense [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | Stock options generally vest on each anniversary date of the original grant ratably over three years. Compensation expense attributed to stock options is based on the fair value of the awards on their respective grant dates, as determined using a Black-Scholes model. The assumptions used to determine the grant date fair value are indicated below.
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