Benefit Plans - Additioal Information (Details) $ in Thousands	1 Months Ended	12 Months Ended				62 Months Ended
	Nov. 30, 2007 participant	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2012 USD ($)
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Maximum contributions of annual participants compensation, percent			80.00%
Maximum contributions of participants bonuses, percent			100.00%
Discretionary contributions by employer			$ 5,345	$ 5,638	$ 4,737
Net periodic benefit cost			521	434	$ 2,343
Deferred compensation plan liabilities, noncurrent			$ 12,778	14,470
Executive Officers and Board of Directors
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Percentage of vested deferred compensation			100.00%
Deferred compensation plan assets			$ 4,868	11,568
Deferred compensation plan liabilities			7,047	18,746
Deferred compensation plan liabilities, current			1,150	11,896
Forecast
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Net periodic benefit cost		$ 434
Supplemental Employment Retention Agreement | Deferred Profit Sharing | Executive Officer
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred compensation plan assets			13,721	6,898
Deferred compensation plan liabilities			14,278	15,970
Deferred compensation plan liabilities, current			1,500	1,500
Funding of deferred compensations						$ 1,500
Number of participants in retention agreement | participant	1
Deferred compensation plan liabilities, noncurrent			$ 12,778	$ 14,470