Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Utility plant:
Gas plant	$ 5,734,807	$ 5,556,599
Less: accumulated depreciation	(2,060,402)	(1,973,098)
Acquisition adjustments, net	415	550
Construction work in progress	118,554	74,332
Net utility plant	3,793,374	3,658,383
Other property and investments	319,243	326,743
Restricted cash	0	821
Current assets:
Cash and cash equivalents	32,959	39,566
Accounts receivable, net of allowances	269,058	281,824
Accrued utility revenue	32,200	73,900
Income taxes receivable, net	37,810	21,853
Deferred income taxes, net	291	2,109
Deferred purchased gas costs	815	87,556
Prepaids and other current assets	105,438	99,975
Total current assets	478,571	606,783
Noncurrent assets:
Goodwill	129,884	143,160
Deferred income taxes	1,688	0
Deferred charges and other assets	460,906	478,625
Total noncurrent assets	592,478	621,785
Total assets	5,183,666	5,214,515
Capitalization:
Common stock, $1 par (authorized-60,000,000 shares; issued and outstanding-47,375,398 and 46,523,184 shares)	49,005	48,153
Additional paid-in capital	894,625	851,381
Accumulated other comprehensive income (loss), net	(48,013)	(50,175)
Retained earnings	654,492	639,164
Total Southwest Gas Corporation equity	1,550,109	1,488,523
Noncontrolling interest	(2,177)	(2,257)
Total equity	1,547,932	1,486,266
Redeemable noncontrolling interest	13,703	20,042
Long-term debt, less current maturities	1,540,364	1,637,592
Total capitalization	3,101,999	3,143,900
Current liabilities:
Current maturities of long-term debt	19,865	19,192
Short-term debt	0	5,000
Accounts payable	129,258	167,988
Customer deposits	72,268	71,546
Income taxes payable	13,643	0
Accrued general taxes	42,249	44,339
Accrued interest	21,730	16,468
Deferred income taxes	7,031	0
Deferred purchased gas costs	44,754	0
Other current liabilities	143,882	145,584
Total current liabilities	494,680	470,117
Deferred income taxes and other credits:
Deferred income taxes and investment tax credits	722,718	723,688
Accumulated removal costs	301,000	304,000
Other deferred credits and other long-term liabilities	563,269	572,810
Total deferred income taxes and other credits	1,586,987	1,600,498
Total capitalization and liabilities	$ 5,183,666	$ 5,214,515