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Stock-Based Compensation (Notes)	9 Months Ended
Stock-Based Compensation (Notes)	Sep. 30, 2019
Stock-Based Compensation [Abstract]
Stock-Based Compensation	Stock-Based Compensation We recognized $2.0 million and $1.5 million in pre-tax compensation expense related to stock options and restricted stock units during the three months ended September 30, 2019 and 2018, respectively, and $4.6 million and $4.5 million during the nine months ended September 30, 2019 and 2018, respectively. During the nine months ended September 30, 2019, we granted approximately 277,000 stock options, 278,000 market-based performance restricted stock units and 199,000 time-vesting restricted stock units. The stock options granted were valued using a Black-Scholes pricing model with the following assumptions: an expected volatility of 48.28% to 55.17%, a risk-free interest rate of 1.75% to 2.34%, an expected dividend yield of 0% to 3.76%, and an expected term of 3.50 to 5.75 years. The weighted-average exercise price of the options granted during the nine months ended September 30, 2019 was $21.34 and the weighted-average grant-date fair value was $9.27. Performance-based restricted stock units are valued using a Monte Carlo simulation. Time-vesting restricted stock units are valued using the closing price on the trading day immediately preceding the day of the grant. The weighted-average grant date fair value of the market-based performance and time-vesting restricted stock units granted during the nine months ended September 30, 2019 was $33.70 and $21.05, respectively.