We disaggregate our revenue arrangements by contract type, customer, and whether the Company performs on the contract as the prime or subcontractor. We believe that these categories allow for a better understanding of the nature, amount, timing, and uncertainty of revenue and cash flows arising from our contracts.

The Company generated revenue on our cost-plus-fee, firm fixed-price, and time-and-materials contracts as follows during the three and six months ended December 31, 2019 and 2018 (in thousands):

	Three Months Ended						Six Months Ended
	December 31, 2019						December 31, 2019
	Domestic		International		Total		Domestic		International		Total
Cost-plus-fee	$	818,477	$	—	$	818,477	$	1,566,191	$	—	$	1,566,191
Firm fixed-price		361,016		27,851		388,867		752,552		54,291		806,843
Time and materials		174,300		13,825		188,125		359,823		26,004		385,827
Total	$	1,353,793	$	41,676	$	1,395,469	$	2,678,566	$	80,295	$	2,758,861

	Three Months Ended						Six Months Ended
	December 31, 2018						December 31, 2018
	Domestic		International		Total		Domestic		International		Total
Cost-plus-fee	$	657,050	$	—	$	657,050	$	1,298,577	$	—	$	1,298,577
Firm fixed-price		313,018		24,356		337,374		634,089		47,289		681,378
Time and materials		172,484		14,733		187,217		336,409		31,141		367,550
Total	$	1,142,552	$	39,089	$	1,181,641	$	2,269,075	$	78,430	$	2,347,505

The Company generated revenue from our primary customer groups as follows during the three and six months ended December 31, 2019 and 2018 (in thousands):

	Three Months Ended						Six Months Ended
	December 31, 2019						December 31, 2019
	Domestic		International		Total		Domestic		International		Total
Department of Defense	$	990,381	$	—	$	990,381	$	1,928,021	$	—	$	1,928,021
Federal civilian agencies		342,029		—		342,029		706,022		—		706,022
Commercial and other		21,383		41,676		63,059		44,523		80,295		124,818
Total	$	1,353,793	$	41,676	$	1,395,469	$	2,678,566	$	80,295	$	2,758,861

	Three Months Ended						Six Months Ended
	December 31, 2018						December 31, 2018
	Domestic		International		Total		Domestic		International		Total
Department of Defense	$	834,797	$	—	$	834,797	$	1,653,063	$	—	$	1,653,063
Federal civilian agencies		287,915		—		287,915		580,117		—		580,117
Commercial and other		19,840		39,089		58,929		35,895		78,430		114,325
Total	$	1,142,552	$	39,089	$	1,181,641	$	2,269,075	$	78,430	$	2,347,505

The Company generated revenue as either the prime or subcontractor as follows during the three and six months ended December 31, 2019 and 2018 (in thousands):

	Three Months Ended						Six Months Ended
	December 31, 2019						December 31, 2019
	Domestic		International		Total		Domestic		International		Total
Prime contractor	$	1,227,317	$	41,676	$	1,268,993	$	2,424,951	$	80,295	$	2,505,246
Subcontractor		126,476		—		126,476		253,615		—		253,615
Total	$	1,353,793	$	41,676	$	1,395,469	$	2,678,566	$	80,295	$	2,758,861

	Three Months Ended						Six Months Ended
	December 31, 2018						December 31, 2018
	Domestic		International		Total		Domestic		International		Total
Prime contractor	$	1,052,867	$	39,089	$	1,091,956	$	2,103,398	$	78,430	$	2,181,828
Subcontractor		89,685		—		89,685		165,677		—		165,677
Total	$	1,142,552	$	39,089	$	1,181,641	$	2,269,075	$	78,430	$	2,347,505

For many of our fixed price revenue arrangements and for revenue arrangements that have award or incentive fees, the Company uses an estimate at completion (EAC) to measure progress towards the complete satisfaction of its performance obligations. For these revenue arrangements, revenue is recognized over time primarily using a cost-to-cost input method based on the ratio of costs incurred to date to total estimated costs at completion. The EAC process requires the Company to use professional judgment when assessing risks, estimating contract revenue and costs, estimating variable consideration, and making assumptions for schedule and technical issues. The Company periodically reassesses its EAC assumptions and updates its estimates as needed. When estimates of total costs to be incurred on a contract exceed total revenue, a provision for the entire loss on the contract is recorded in the period in which the loss is determined.

Based on changes in a contract’s EAC, a cumulative adjustment to revenue will be recorded. For the three and six months ended December 31, 2019, we recognized an increase to income before income taxes of $17.2 million ($0.50 per diluted share) and $23.8 million ($0.69 per diluted share), respectively, compared with $4.2 million ($0.12 per diluted share) and $10.6 million ($0.31 per diluted share) for the three and six months ended December 31, 2018, respectively, from EAC adjustments. The Company used its statutory tax rate when calculating the impact to diluted earnings per share.

Revenue recognized from previously satisfied performance obligations was $9.8 million and $10.2 million for the three and six months ended December 31, 2019, respectively, compared with an immaterial amount for the three and six months ended December 31, 2018. The change in revenue generally relates to final true-up adjustments to our estimated award or incentive fees in the period in which we receive the customer’s final performance score or when we can determine that more objective, contractually-defined criteria have been fully satisfied. During the three months ended December 31, 2019, the Company received notification that certain contract close out risks had been mitigated on previously satisfied performance obligations and therefore recorded a reduction to its established reserve amount.

The Company’s remaining performance obligations balance as of period end represents the expected revenue to be recognized for the satisfaction of remaining performance obligations on our existing contracts. This balance excludes unexercised contract option years and task orders that may be issued underneath an Indefinite Delivery/Indefinite Quantity (IDIQ) vehicle until such task orders are awarded. The remaining performance obligations balance generally increases with the execution of new contracts and converts into revenue as our contractual performance obligations are satisfied.

The Company continues to monitor this balance as it is subject to change from execution of new contracts, contract modifications or extensions, government deobligations, or early terminations. Based on this analysis, an adjustment to the period end balance may be required. Our remaining performance obligations balance as of December 31, 2019 was $6.4 billion.

The Company expects to recognize approximately 84 percent of our remaining performance obligations balance as revenue over the next twelve months and the remaining 16 percent thereafter.