Stock Benefit Plans - Summary of Stock, Restricted Stock, and Restricted Stock Unit Activity (Details) - Long Term Incentive Plan - Restricted Stock and Restricted Stock Units - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Shares
Non-vested balance at the beginning of the period (in shares)	16
Granted (in shares)	62
Vested (in shares)	(16)
Forfeited (in shares)	0
Canceled (in shares)	0
Non-vested balance at the end of the period (in shares)	62	16
Weighted Average Grant Date Fair Value Per Share ($)
Non-vested balance at the beginning of the period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 63.69
Granted, Weighted Average Grant Date Fair Value (in dollars per share)	48.29	$ 63.80	$ 61.74
Vested, Weighted Average Grant Date Fair Value (in dollars per share)	63.69
Forfeited, Weighted Average Grant Date Fair Value (in dollars per share)	0
Canceled (in dollars per share)	0
Non-vested balance at the end of the period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 48.29	$ 63.69