
	Three Months Ended June 28, 2020
	GMS		NSS		Total
DoD	$	204,634	$	62,096	$	266,730
Other U.S. government agencies	260,714		49,434		310,148
Commercial and non-U.S. customers	42,506		23,919		66,425
Total	$	507,854	$	135,449	$	643,303


	Six Months Ended June 28, 2020
	GMS		NSS		Total
DoD	$	392,240	$	129,275	$	521,515
Other U.S. government agencies	510,660		120,156		630,816
Commercial and non-U.S. customers	62,398		45,827		108,225
Total	$	965,298	$	295,258	$	1,260,556


	Three Months Ended June 30, 2019
	GMS		NSS		Total
DoD	$	214,657	$	56,713	$	271,370
Other U.S. government agencies	281,154		93,742		374,896
Commercial and non-U.S. customers	30,214		19,127		49,341
Total	$	526,025	$	169,582	$	695,607


	Six Months Ended June 30, 2019
	GMS		NSS		Total
DoD	$	415,059	$	115,464	$	530,523
Other U.S. government agencies	555,266		182,952		738,218
Commercial and non-U.S. customers	60,179		40,171		100,350
Total	$	1,030,504	$	338,587	$	1,369,091


	Three Months Ended June 28, 2020
	GMS		NSS		Total
Cost-reimbursable	$	299,906	$	34,288	$	334,194
Fixed-price	158,247		53,693		211,940
Time and materials	49,701		47,468		97,169
Total	$	507,854	$	135,449	$	643,303


	Six Months Ended June 28, 2020
	GMS		NSS		Total
Cost-reimbursable	$	565,986	$	71,192	$	637,178
Fixed-price	320,285		122,650		442,935
Time and materials	79,027		101,416		180,443
Total	$	965,298	$	295,258	$	1,260,556


	Three Months Ended June 30, 2019
	GMS		NSS		Total
Cost-reimbursable	$	304,688	$	23,481	$	328,169
Fixed-price	175,592		72,080		247,672
Time and materials	45,745		74,021		119,766
Total	$	526,025	$	169,582	$	695,607


	Six Months Ended June 30, 2019
	GMS		NSS		Total
Cost-reimbursable	$	595,379	$	45,703	$	641,082
Fixed-price	350,991		148,594		499,585
Time and materials	84,134		144,290		228,424
Total	$	1,030,504	$	338,587	$	1,369,091


	Three Months Ended June 28, 2020
	GMS		NSS		Total
United States	$	277,536	$	133,875	$	411,411
International	230,318		1,574		231,892
Total	$	507,854	$	135,449	$	643,303


	Six Months Ended June 28, 2020
	GMS		NSS		Total
United States	$	526,446	$	292,014	$	818,460
International	438,852		3,244		442,096
Total	$	965,298	$	295,258	$	1,260,556


	Three Months Ended June 30, 2019
	GMS		NSS		Total
United States	$	261,413	$	167,923	$	429,336
International	264,612		1,659		266,271
Total	$	526,025	$	169,582	$	695,607


	Six Months Ended June 30, 2019
	GMS		NSS		Total
United States	$	521,501	$	335,707	$	857,208
International	509,003		2,880		511,883
Total	$	1,030,504	$	338,587	$	1,369,091

The Company’s remaining performance obligations balance represents the expected revenue to be recognized for the satisfaction of remaining performance obligations on existing contracts. This balance excludes unexercised contract option years and task orders that may be issued underneath an indefinite delivery, indefinite quantity contract. The remaining performance obligations balance as of June 28, 2020 and December 31, 2019 was $1,260.0 million and $1,640.0 million, respectively.

The Company expects to recognize approximately 95.2% and 4.8% of the remaining performance obligations balance as revenue over the next year and thereafter, respectively.

Contract assets consist of unbilled receivables which represent rights to payment for work or services completed but not billed as of the reporting date. Contract assets are recorded as unbilled receivables within accounts receivable, net on the condensed consolidated balance sheets.

Contract liabilities are advances and milestone payments from customers on certain contracts that exceed revenue earned to date. Contract liabilities are recorded as customer advances and billings in excess of costs on the condensed consolidated balance sheets.

Contract assets and contract liabilities consisted of the following as of the dates presented (in thousands):


	June 28,		December 31,
	2020		2019
Contract assets	$	297,146	$	295,103
Contract liabilities	$	70,695	$	51,439

The increase in contract assets of $2.0 million during the six-month period ended June 28, 2020 was primarily due to the timing of billings, partially offset by revenue recognized related to the satisfaction of performance obligations.

The increase in contract liabilities of $19.3 million during the six-month period ended June 28, 2020 was primarily due to the timing of advance payments from customers partially offset by revenue recognized during the period.

During the three-month and six-month periods ended June 28, 2020, the Company recognized $1.1 million and $33.4 million, respectively, relating to amounts that were included in the beginning balance of contract liabilities. During the three-month and six-month periods ended June 30, 2019, the Company recognized $4.5 million and $16.6 million, respectively, relating to amounts that were included in the beginning balance of contract liabilities.