Stockholders' Equity (Details) $ / shares in Units, $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($) vote $ / shares shares	Mar. 31, 2018 USD ($) shares
Accumulated Other Comprehensive Income (Loss) [Line Items]
Common stock shares authorized (in shares)	300,000,000.0
Common stock par value (USD per share) \| $ / shares	$ 0.01
Preferred stock authorized shares (in shares)	10,000.00
Preferred stock par or stated value (in dollars per share) \| $ / shares	$ 0.01
Common stock, number of votes granted per common share held \| vote	1
Treasury stock, shares, acquired (in shares)	15,731	0
Value of treasury stock acquired \| $	$ 0.8
Performance-based Restricted Stock Units
Accumulated Other Comprehensive Income (Loss) [Line Items]
Value of treasury stock acquired \| $	$ 2.9	$ 2.9
Repurchase of shares upon vesting of PRSUs withheld to satisfy tax withholding obligations (in shares)	100,000
February 2016 Program
Accumulated Other Comprehensive Income (Loss) [Line Items]
Remaining shares under share repurchase authorization \| $	$ 226.1

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Face amount or stated value per share of common stock.

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Amount remaining of a stock repurchase plan authorized.

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