Schedule II - Valuation And Qualifying Accounts

12 Months Ended

Dec. 31, 2020

Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation And Qualifying Accounts

ORION GROUP HOLDINGS, INC.

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

(Dollars in thousands)

	Balance at the		Charged to				Balance at the
	Beginning of		Revenue, Cost				End of
Description	the Period		or Expense		Deduction		the Period
Year ended December 31, 2018
Allowance for credit losses	$	—	$	4,280	$	—	$	4,280
Reserve for losses on uncompleted contracts	$	—	$	22,770	$	—	$	22,770
Year ended December 31, 2019
Allowance for credit losses	$	4,280	$	—	$	1,680	$	2,600
Reserve for losses on uncompleted contracts	$	22,770	$	2,455	$	14,300	$	10,925
Year ended December 31, 2020
Allowance for credit losses	$	2,600	$	(487)	$	1,702	$	411
Reserve for losses on uncompleted contracts	$	10,925	$	543	$	9,995	$	1,473