Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Utility plant:
Gas plant	$ 6,019,299	$ 5,854,917
Less: accumulated depreciation	(2,134,661)	(2,084,007)
Acquisition adjustments, net	280	370
Construction work in progress	115,218	119,805
Net utility plant	4,000,136	3,891,085
Other property and investments	346,057	313,531
Current assets:
Cash and cash equivalents	12,126	35,997
Accounts receivable, net of allowances	263,855	314,512
Accrued utility revenue	32,500	74,700
Income taxes receivable, net	37,455	34,175
Deferred purchased gas costs	0	3,591
Prepaids and other current assets	85,826	95,199
Total current assets	431,762	558,174
Noncurrent assets:
Goodwill	144,086	126,145
Deferred income taxes	752	428
Deferred charges and other assets	444,047	469,322
Total noncurrent assets	588,885	595,895
Total assets	5,366,840	5,358,685
Capitalization:
Common stock, $1 par (authorized - 60,000,000 shares; issued and outstanding - 47,476,604 and 47,377,575 shares)	49,106	49,007
Additional paid-in capital	900,886	896,448
Accumulated other comprehensive income (loss), net	(47,195)	(50,268)
Retained earnings	741,148	699,221
Total Southwest Gas Corporation equity	1,643,945	1,594,408
Noncontrolling interest	(2,175)	(2,083)
Total equity	1,641,770	1,592,325
Redeemable noncontrolling interest	15,542	16,108
Long-term debt, less current maturities	1,427,805	1,551,204
Total capitalization	3,085,117	3,159,637
Current liabilities:
Current maturities of long-term debt	49,567	19,475
Short-term debt	0	18,000
Accounts payable	132,200	164,857
Customer deposits	72,814	72,631
Income taxes payable	7	940
Accrued general taxes	39,337	47,337
Accrued interest	15,849	16,173
Deferred purchased gas costs	126,299	45,601
Other current liabilities	146,648	150,031
Total current liabilities	582,721	535,045
Deferred income taxes and other credits:
Deferred income taxes and investment tax credits	817,855	769,445
Accumulated removal costs	306,000	303,000
Other deferred credits and other long-term liabilities	575,147	591,558
Total deferred income taxes and other credits	1,699,002	1,664,003
Total capitalization and liabilities	$ 5,366,840	$ 5,358,685