Compensation Plans (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) hour shares	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
LTIP Expense	$ 16,119,000	$ 21,438,000	$ 21,264,000
Deferred Profit Sharing
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Profit Sharing Plan Minimum Contribution, Percent	5.00%
Number of service hours required (in hours) | hour	250
Profit Sharing Plan, Contributions Vesting Immediately, Percent	40.00%
Profit Sharing Plan, Contributions Vesting Based on Years of Service, Percent	60.00%
Profit sharing expense	$ 47,000,000	42,000,000	42,000,000
2013 grant
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
LTIP Expense	0	(1,124,000)	7,667,000
2014 grant
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
LTIP Expense	$ (558,000)	3,227,000	3,167,000
2015 grant
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Long-Term Incentive Compensation Plan, Number of Units Oustanding | shares	179,250
Long-Term Incentive Compensation Plan, Maximum Value	$ 17,925,000
Long-Term Incentive Compensation Plan, Earned	17,925,000
LTIP Expense	$ 3,319,000	5,170,000	3,667,000
2016 grant
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Long-Term Incentive Compensation Plan, Number of Units Oustanding | shares	199,500
Long-Term Incentive Compensation Plan, Maximum Value	$ 19,950,000
Long-Term Incentive Compensation Plan, Earned	15,243,000
LTIP Expense	$ 3,548,000	5,148,000	3,601,000
2017 grant
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Long-Term Incentive Compensation Plan, Number of Units Oustanding | shares	210,000
Long-Term Incentive Compensation Plan, Maximum Value	$ 21,000,000
Long-Term Incentive Compensation Plan, Earned	10,938,900
LTIP Expense	$ 3,432,000	4,700,000	3,162,000
2018 grant
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Long-Term Incentive Compensation Plan, Number of Units Oustanding | shares	215,250,000
Long-Term Incentive Compensation Plan, Maximum Value	$ 21,525,000
Long-Term Incentive Compensation Plan, Earned	7,501,463
LTIP Expense	$ 3,310,000	4,317,000	0
2019 grant
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Long-Term Incentive Compensation Plan, Number of Units Oustanding | shares	228,750,000
Long-Term Incentive Compensation Plan, Maximum Value	$ 22,875,000
Long-Term Incentive Compensation Plan, Earned	3,068,338
LTIP Expense	$ 3,068,000	$ 0	$ 0