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Letters of Credit	12 Months Ended
Letters of Credit	Dec. 31, 2019
Financial Instruments Pledged as Collateral [Abstract]
Letters of Credit	Letters of Credit As of December 31, 2019 and 2018, the Company had a $35.0 million and $35.0 million unsecured standby letter of credit facility, of which $23.3 million and $18.1 million had been drawn upon for issued letters of credit, respectively.