Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2020

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Summary of Valuation Allowance

The table below summarizes the activity in the Company’s allowance for losses for the years ended December 31 (in thousands).

	Balance at Beginning of Year		Additions Charged to Expense		Deductions from the Reserve		Reclassification to Accounts Payable and Accrued Liabilities (1)		Balance at End of Year
2020	$	8,000	$	16,000	$	(14,000)	$	—	$	10,000
2019	$	7,700	$	14,000	$	(13,700)	$	—	$	8,000
2018	$	12,700	$	12,500	$	(11,300)	$	(6,200)	$	7,700

(1) The allowance for losses at December 31, 2017 included $6.2 million that was attributable to the Company’s revenue reserve. As a result of the Company’s adoption of ASC 606 on January 1, 2018, the revenue reserve balance is now included in Accounts payable and accrued liabilities on the Consolidated Balance Sheets. Note 9 — Revenue and Related Matters provides additional information regarding the Company’s adoption of ASC 606.