Stock-Based Compensation Plans - Summary of Nonvested LTIP Performance Shares (Details) - LTIP Performance Shares	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Number of Shares at Expected Attainment
Nonvested, beginning balance (in shares) | shares	540,697
Forfeited (in shares) | shares	(56,567)
Change in expected attainment (in shares) | shares	185,339
Nonvested, ending balance (in shares) | shares	669,469
Weighted Average Grant Date Fair Value
Nonvested, beginning balance (in dollars per share) | $ / shares	$ 19.83
Forfeited (in dollars per share) | $ / shares	18.80
Change in expected attainment (in dollars per share) | $ / shares	20.09
Nonvested, ending balance (in dollars per share) | $ / shares	$ 20.12