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Business Segments (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Schedule of reporting segments information

Capital additions reflect capital expenditures paid in cash and exclude U.S. government-funded and third-party prime funded capital expenditures for ASUS and property installed by developers and conveyed to GSWC and BVESI.

						As Of And For The Year Ended December 31, 2020
																								AWR						Consolidated
(dollars in thousands)						Water						Electric						ASUS						Parent						AWR
Operating revenues						$	330,637					$	37,024					$	120,582					$	—					$	488,243
Operating income (loss)						97,896						10,303						22,309						(9)						130,499
Interest expense, net						20,312						584						(496)						330						20,730
Utility Plant						1,400,489						89,308						22,246						—						1,512,043
Depreciation and amortization expense (1)						30,969						2,479						3,402						—						36,850
Income tax expense (benefit)						20,515						2,689						5,201						(208)						28,197
Capital additions						107,355						18,393						4,675						—						130,423

						As Of And For The Year Ended December 31, 2019
						GSWC																		AWR						Consolidated
(dollars in thousands)						Water						Electric						ASUS						Parent						AWR
Operating revenues						$	319,830					$	39,548					$	114,491					$	—					$	473,869
Operating income (loss)						93,895						11,197						21,990						(9)						127,073
Interest expense, net						20,304						1,228						(734)						539						21,337
Utility Plant						1,322,062						72,680						20,963						—						1,415,705
Depreciation and amortization expense (1)						29,956						2,485						2,956						—						35,397
Income tax expense/(benefit)						17,295						2,882						5,202						(709)						24,670
Capital additions						131,353						11,499						9,088						—						151,940

						As Of And For The Year Ended December 31, 2018
						GSWC																		AWR						Consolidated
(dollars in thousands)						Water						Electric						ASUS						Parent						AWR
Operating revenues						$	295,258					$	34,350					$	107,208					$	—					$	436,816
Operating income						74,342						6,220						20,414						7						100,983
Interest expense, net						18,403						1,328						(327)						451						19,855
Utility Plant						1,218,468						62,624						15,218						—						1,296,310
Depreciation and amortization expense (1)						36,137						2,258						2,030						—						40,425
Income tax expense/(benefit)						12,391						1,212						4,939						(525)						18,017
Capital additions						110,934						5,420						10,207						—						126,561

Schedule of reconciliation of total utility plant (a key figure for rate-making) to total consolidated assets

The following table reconciles total utility plant (a key figure for rate-making) to total consolidated assets (in thousands):

						December 31,
						2020						2019
Total utility plant						$	1,512,043					$	1,415,705
Other assets						279,560						225,626
Total consolidated assets						$	1,791,603					$	1,641,331

X

- Definition

Tabular disclosure of reconciliation of total utility plant (a key figure for rate-making) to total consolidated assets.

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- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

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