CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Utility plant:
Gas plant	$ 7,949,283	$ 7,813,221
Less: accumulated depreciation	(2,341,561)	(2,313,050)
Construction work in progress	202,935	185,026
Net utility plant	5,810,657	5,685,197
Other property and investments	785,522	784,173
Current assets:
Cash and cash equivalents	60,965	49,539
Accounts receivable, net of allowances	423,013	474,097
Accrued utility revenue	48,100	79,100
Income taxes receivable, net	7,503	31,751
Deferred purchased gas costs	0	44,412
Prepaid and other current assets	133,338	180,957
Total current assets	672,919	859,856
Noncurrent assets:
Goodwill	333,943	343,023
Deferred income taxes	765	856
Deferred charges and other assets	489,419	496,943
Total noncurrent assets	824,127	840,822
Total assets	8,093,225	8,170,048
Capitalization:
Common stock, $1 par (authorized - 120,000,000 shares; issued and outstanding - 55,126,386 and 55,007,433 shares)	56,756	56,637
Additional paid-in capital	1,470,411	1,466,937
Accumulated other comprehensive loss, net	(59,073)	(56,732)
Retained earnings	1,079,801	1,039,072
Total equity	2,547,895	2,505,914
Redeemable noncontrolling interest	85,005	84,542
Long-term debt, less current maturities	2,310,084	2,300,482
Total capitalization	4,942,984	4,890,938
Current liabilities:
Current maturities of long-term debt	169,574	163,512
Short-term debt	157,000	211,000
Accounts payable	182,182	238,921
Customer deposits	69,938	69,165
Income taxes payable, net	0	2,069
Accrued general taxes	73,105	48,160
Accrued interest	34,755	21,329
Deferred purchased gas costs	26,498	60,755
Other current liabilities	266,763	264,950
Total current liabilities	979,815	1,079,861
Deferred income taxes and other credits:
Deferred income taxes and investment tax credits, net	624,888	599,840
Accumulated removal costs	399,000	395,000
Other deferred credits and other long-term liabilities	1,146,538	1,204,409
Total deferred income taxes and other credits	2,170,426	2,199,249
Total capitalization and liabilities	8,093,225	8,170,048
Southwest Gas Corporation
Utility plant:
Gas plant	7,949,283	7,813,221
Less: accumulated depreciation	(2,341,561)	(2,313,050)
Construction work in progress	202,935	185,026
Net utility plant	5,810,657	5,685,197
Other property and investments	118,547	133,787
Current assets:
Cash and cash equivalents	56,524	40,489
Accounts receivable, net of allowances	148,817	150,793
Accrued utility revenue	48,100	79,100
Income taxes receivable, net	0	25,901
Deferred purchased gas costs	0	44,412
Prepaid and other current assets	119,264	165,639
Total current assets	372,705	506,334
Noncurrent assets:
Goodwill	10,095	10,095
Deferred charges and other assets	456,684	463,333
Total noncurrent assets	466,779	473,428
Total assets	6,768,688	6,798,746
Capitalization:
Common stock, $1 par (authorized - 120,000,000 shares; issued and outstanding - 55,126,386 and 55,007,433 shares)	49,112	49,112
Additional paid-in capital	1,279,208	1,229,083
Accumulated other comprehensive loss, net	(53,487)	(55,151)
Retained earnings	839,443	782,108
Total equity	2,114,276	2,005,152
Long-term debt, less current maturities	1,991,624	1,991,333
Total capitalization	4,105,900	3,996,485
Current liabilities:
Current maturities of long-term debt	125,000	125,000
Short-term debt	97,000	194,000
Accounts payable	108,569	149,368
Customer deposits	69,938	69,165
Income taxes payable, net	19,241	0
Accrued general taxes	73,105	48,160
Accrued interest	34,714	21,256
Deferred purchased gas costs	26,498	60,755
Payable to parent	174	844
Other current liabilities	147,950	126,573
Total current liabilities	702,189	795,121
Deferred income taxes and other credits:
Deferred income taxes and investment tax credits, net	547,281	539,050
Accumulated removal costs	399,000	395,000
Other deferred credits and other long-term liabilities	1,014,318	1,073,090
Total deferred income taxes and other credits	1,960,599	2,007,140
Total capitalization and liabilities	$ 6,768,688	$ 6,798,746