Stock Based Compensation - Summary of Stock Option Activity (Parenthetical) (Details) - 2010 SIP and 2019 SIP - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Shares not yet awarded Granted	822,982	1,014,269	1,123,408
Potential Payout	365,606	501,384	576,886
Targeted payout	100.00%	100.00%	100.00%
Tranche One
Potential Payout	20,611
Tranche Two
Potential Payout	15,850
Tranche Three
Potential Payout	56,226
Maximum
Performance of final target percentage	200.00%	200.00%	200.00%
Maximum | Tranche One
Performance of final target percentage	120.00%
Maximum | Tranche Two
Performance of final target percentage	150.00%
Maximum | Tranche Three
Performance of final target percentage	150.00%
Minimum
Performance of final target percentage	0.00%	0.00%	0.00%
Minimum | Tranche One
Performance of final target percentage	0.00%
Minimum | Tranche Two
Performance of final target percentage	0.00%
Minimum | Tranche Three
Performance of final target percentage	50.00%