Stock-Based Compensation Plans Stock-Based Compensation Plans (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2019 |
Dec. 31, 2018 |
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Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Valuation assumptions | The weighted-average estimated value of SPRs outstanding as of December 31, 2019 was $25.34 per SPR using the following assumptions:
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Activity related to SPRs | Activity related to the Company’s SPRs during the year ended December 31, 2019 was as follows:
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Activity related to RSAs | Activity related to the Company’s RSAs during the year ended December 31, 2019 was as follows:
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MSU Rollforward | Market Stock Units ("MSUs") are exchangeable for between 0% to 150% of the Company's common shares at the end of the vesting period based on the trailing 60 day average closing price of the Company's common stock. The value of the MSUs was determined using a geometric brownian motion model that, based on certain variables, generates a large number of random trials simulating the price of the common stock over the measurement period. Expenses of $1.2 million related to MSUs were recorded in General and administrative expenses in both of the years ended December 31, 2019 and 2018. Activity related to the Company’s MSUs during the year ended December 31, 2019 was as follows:
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Stock Option Activity Table | Stock Options Each stock option can be exchanged for one share of the Company’s common stock at the stated exercise price. Expense related to stock options was $0.1 million in both 2019 and 2018. Unrecognized compensation at December 31, 2019 was $0.1 million. Upon vesting, stock options are recognized as a component of equity. Activity related to stock options during the year ended December 31, 2019 was as follows:
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