Nature of Operations and Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Goodwill

(In thousands of dollars)	Natural Gas Operations		Construction Services			Consolidated
December 31, 2014	$	10,095	$	133,065		$	143,160
Acquisition date adjustment		—		1,380			1,380
Foreign currency translation adjustment		—		(6,283	)		(6,283	)
June 30, 2015	$	10,095	$	128,162		$	138,257

Intercompany Transactions

Centuri’s accounts receivable for these services are presented in the table below (thousands of dollars):

	June 30, 2015		December 31, 2014
Centuri accounts receivable for services provided to Southwest	$	10,531	$	9,169

Schedule of Other Property and Investments

Other Property and Investments. Other property and investments includes (millions of dollars):

	June 30, 2015			December 31, 2014
Centuri property and equipment	$	419		$	405
Centuri accumulated provision for depreciation and amortization		(206	)		(187	)
Net cash surrender value of COLI policies		101			99
Other property		11			10
Total	$	325		$	327

Other Income (Deductions)

The following table provides the composition of significant items included in Other income (deductions) in the condensed consolidated statements of income (thousands of dollars):

	Three Months Ended						Six Months Ended					Twelve Months Ended
	June 30						June 30					June 30
	2015			2014			2015			2014		2015			2014
Change in COLI policies	$	—		$	2,300		$	1,300		$	3,200	$	3,400		$	10,000
Interest income		161			612			751			1,109		2,244			1,306
Pipe replacement costs		—			—			—			—		—			(11	)
Foreign transaction gain (loss)		(245	)		—			(572	)		—		(750	)		—
Miscellaneous income and (expense)		246			(49	)		955			166		172			(41	)
Total other income (deductions)	$	162		$	2,863		$	2,434		$	4,475	$	5,066		$	11,254