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Segment Information (Tables)
3 Months Ended
Mar. 31, 2020
Segment Reporting [Abstract]  
Summary of Financial Information by Segment
The following tables present summarized financial information for PNMR by segment. PNM and TNMP each operate in only one segment. Therefore, tabular segment information is not presented for PNM and TNMP.

PNMR SEGMENT INFORMATION
PNMTNMPCorporate
and Other
PNMR Consolidated
(In thousands)
Three Months Ended March 31, 2020
Electric operating revenues$248,133  $85,489  $—  $333,622  
Cost of energy74,524  24,186  —  98,710  
Utility margin173,609  61,303  —  234,912  
Other operating expenses98,555  25,122  (5,476) 118,201  
Depreciation and amortization41,449  21,836  5,688  68,973  
Operating income (loss)33,605  14,345  (212) 47,738  
Interest income3,496  —  (73) 3,423  
Other income (deductions)(34,027) 561  (540) (34,006) 
Interest charges(17,629) (7,172) (5,633) (30,434) 
Segment earnings (loss) before income taxes
(14,555) 7,734  (6,458) (13,279) 
Income taxes (benefit)(2,359) 642  (163) (1,880) 
Segment earnings (loss)
(12,196) 7,092  (6,295) (11,399) 
Valencia non-controlling interest
(3,729) —  —  (3,729) 
Subsidiary preferred stock dividends
(132) —  —  (132) 
Segment earnings (loss) attributable to PNMR
$(16,057) $7,092  $(6,295) $(15,260) 
At March 31, 2020:
Total Assets
$5,260,528  $1,913,270  $201,321  $7,375,119  
Goodwill
$51,632  $226,665  $—  $278,297  
PNMTNMPCorporate
and Other
PNMR Consolidated
(In thousands)
Three Months Ended March 31, 2019
Electric operating revenues$269,318  $80,327  $—  $349,645  
Cost of energy99,339  22,287  —  121,626  
Utility margin169,979  58,040  —  228,019  
Other operating expenses106,462  25,241  (5,763) 125,940  
Depreciation and amortization39,224  20,214  5,918  65,356  
Operating income (loss)24,293  12,585  (155) 36,723  
Interest income3,656  —  (68) 3,588  
Other income (deductions)14,358  585  (735) 14,208  
Interest charges(18,360) (8,800) (4,474) (31,634) 
Segment earnings (loss) before income taxes
23,947  4,370  (5,432) 22,885  
Income taxes (benefit)1,973  272  (1,022) 1,223  
Segment earnings (loss)
21,974  4,098  (4,410) 21,662  
Valencia non-controlling interest
(2,830) —  —  (2,830) 
Subsidiary preferred stock dividends
(132) —  —  (132) 
Segment earnings (loss) attributable to PNMR
$19,012  $4,098  $(4,410) $18,700  
At March 31, 2019:
Total Assets
$5,202,039  $1,871,780  $176,939  $7,250,758  
Goodwill
$51,632  $226,665  $—  $278,297