Stock-Based Compensation - Stock Compensation Plans (Details)	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Stock Options Outstanding
Stock options outstanding, number of shares, balance (in shares) | shares	692,000
Stock options exercised, exercised (in shares) | shares	(1,000)
Stock options outstanding, number of shares, balance (in shares) | shares	691,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Stock options, weighted average exercise price, balance (in dollars per share) | $ / shares	$ 22.46
Stock options, weighted average exercise price, exercised (in dollars per share) | $ / shares	10.71
Stock options, weighted average exercise price, balance (in dollars per share) | $ / shares	$ 22.48
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Stock options outstanding, number of shares, exercisable (in shares) | shares	691,000
Stock options outstanding, weighted average exercise price, exercisable (in dollars per share) | $ / shares	$ 22.48
Non-vested Stock Awards Outstanding
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested shares outstanding, balance (in shares) | shares	21,000
Non-vested shares outstanding, vested (earned) (in shares) | shares	(4,000)
Non-vested shares outstanding, balance (in shares) | shares	17,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested shares outstanding. weighted-average grant-date fair value, balance (in dollars per share) | $ / shares	$ 23.19
Non-vested shares outstanding. weighted-average grant-date fair value, vested (earned) (in dollars per share) | $ / shares	20.88
Non-vested shares outstanding. weighted-average grant-date fair value, balance (in dollars per share) | $ / shares	$ 23.75
Non-vested Stock Units Outstanding
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested shares outstanding, balance (in shares) | shares	1,152,000
Non-vested shares outstanding, granted (in shares) | shares	425,000
Non-vested shares outstanding, vested (earned) (in shares) | shares	(351,000)
Non-vested shares outstanding, forfeited/expired (in shares) | shares	(42,000)
Non-vested shares outstanding, balance (in shares) | shares	1,184,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested shares outstanding. weighted-average grant-date fair value, balance (in dollars per share) | $ / shares	$ 26.79
Non-vested shares outstanding. weighted-average grant-date fair value, granted (in dollars per share) | $ / shares	23.26
Non-vested shares outstanding. weighted-average grant-date fair value, vested (earned) (in dollars per share) | $ / shares	26.35
Non-vested shares outstanding. weighted-average grant-date fair value, forfeited/expired (in dollars per share) | $ / shares	27.01
Non-vested shares outstanding. weighted-average grant-date fair value, balance (in dollars per share) | $ / shares	$ 25.64