3. Accounts Receivable

Accounts receivable, net as of the beginning of the prior year period, or January 1, 2024, were $112.7 million.

Balances billed but not paid by customers under retainage provisions in contracts within the Condensed Consolidated Balance Sheets amounted to approximately $15.8 million and $13.6 million at June 30, 2025 and December 31, 2024, respectively. Retainage receivables on contracts in progress are generally collected within a year or two subsequent to contract completion, and are recorded in either "Accounts receivable, net" or "Deferred charges and other assets" within the Condensed Consolidated Balance Sheets depending on timing of expected collection.