Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash Flows From Operating Activities:
Net Earnings	$ 17,852	$ 16,131
Net earnings	14,340	12,468
Adjustments to reconcile net earnings to net cash flows from operating activities:
Depreciation and amortization	55,062	51,949
Deferred income tax expense	8,326	6,276
Net unrealized (gains) losses on commodity derivatives	1,720	2,761
Realized (gains) on available-for-sale securities	(4,024)	(2,573)
Stock based compensation expense	2,214	2,131
Regulatory disallowances	215	0
Other, net	148	1,005
Changes in certain assets and liabilities:
Accounts receivable and unbilled revenues	12,170	17,207
Materials, supplies, and fuel stock	(2,657)	5,894
Other current assets	3,817	8,344
Other assets	4,220	6,386
Accounts payable	(2,639)	(34,373)
Accrued interest and taxes	24,811	25,813
Other current liabilities	(21,223)	(30,359)
Other liabilities	(33,278)	(199)
Net cash flows from operating activities	66,734	76,393
Cash Flows From Investing Activities:
Additions to utility and non-utility plant	(100,214)	(83,838)
Proceeds from sales of available-for-sale securities	31,852	22,804
Purchases of available-for-sale securities	(32,661)	(23,612)
Return of principal on PVNGS lessor notes	14,188	10,231
Other, net	144	13
Net cash flows from investing activities	(86,691)	(74,402)
Cash Flows From Financing Activities:
Short-term borrowings (repayments), net	(5,600)	(49,200)
Long-term borrowings	150,000	175,000
Repayment of long-term debt	0	(75,000)
Proceeds from stock option exercise	6,847	3,258
Awards of common stock	(17,140)	(11,639)
Dividends paid	(16,063)	(14,868)
Valencia’s transactions with its owner	(4,160)	(4,369)
Other, net	194	(539)
Net cash flows from financing activities	114,078	22,643
Change in Cash and Cash Equivalents	94,121	24,634
Cash and Cash Equivalents at Beginning of Period	28,274	2,533
Cash and Cash Equivalents at End of Period	122,395	27,167
Supplemental Cash Flow Disclosures:
Interest paid, net of amounts capitalized	6,191	4,718
Income taxes paid (refunded), net	(1,450)	(1,419)
Supplemental schedule of noncash investing activities:
Changes in accrued plant additions	5,186	(13,095)
Public Service Company of New Mexico [Member]
Cash Flows From Operating Activities:
Net Earnings	13,502	11,205
Net earnings	10,122	7,674
Adjustments to reconcile net earnings to net cash flows from operating activities:
Depreciation and amortization	37,470	35,950
Deferred income tax expense	5,908	4,185
Net unrealized (gains) losses on commodity derivatives	1,720	2,761
Realized (gains) on available-for-sale securities	(4,024)	(2,573)
Regulatory disallowances	215	0
Other, net	(974)	1,042
Changes in certain assets and liabilities:
Accounts receivable and unbilled revenues	12,385	15,018
Materials, supplies, and fuel stock	(2,558)	5,974
Other current assets	5,110	6,809
Other assets	4,479	6,042
Accounts payable	4,622	(31,847)
Accrued interest and taxes	22,832	22,362
Other current liabilities	(18,836)	(29,609)
Other liabilities	(30,178)	(806)
Net cash flows from operating activities	51,673	46,513
Cash Flows From Investing Activities:
Additions to utility and non-utility plant	(81,988)	(51,594)
Proceeds from sales of available-for-sale securities	31,852	22,804
Purchases of available-for-sale securities	(32,661)	(23,612)
Return of principal on PVNGS lessor notes	14,188	10,231
Other, net	144	(1)
Net cash flows from investing activities	(68,465)	(42,172)
Cash Flows From Financing Activities:
Short-term borrowings (repayments), net	0	(49,200)
Short-term borrowings (repayments), affiliate, net	0	(32,500)
Long-term borrowings	0	175,000
Repayment of long-term debt	0	(75,000)
Dividends paid	(132)	(132)
Valencia’s transactions with its owner	(4,160)	(4,369)
Other, net	(144)	(409)
Net cash flows from financing activities	(4,436)	13,390
Change in Cash and Cash Equivalents	(21,228)	17,731
Cash and Cash Equivalents at Beginning of Period	25,480	21
Cash and Cash Equivalents at End of Period	4,252	17,752
Supplemental Cash Flow Disclosures:
Interest paid, net of amounts capitalized	4,287	4,222
Income taxes paid (refunded), net	(1,450)	(215)
Supplemental schedule of noncash investing activities:
Changes in accrued plant additions	7,421	(8,133)
Texas-New Mexico Power Company [Member]
Cash Flows From Operating Activities:
Net Earnings	7,694	6,803
Net earnings	7,694	6,803
Adjustments to reconcile net earnings to net cash flows from operating activities:
Depreciation and amortization	13,831	12,851
Deferred income tax expense	4,170	3,665
Other, net	0	(36)
Changes in certain assets and liabilities:
Accounts receivable and unbilled revenues	(215)	2,189
Materials, supplies, and fuel stock	(99)	(81)
Other current assets	981	2,446
Other assets	(139)	302
Accounts payable	(7,640)	(2,551)
Accrued interest and taxes	(2,006)	335
Other current liabilities	368	(1,768)
Other liabilities	(3,631)	1,465
Net cash flows from operating activities	13,314	25,620
Cash Flows From Investing Activities:
Additions to utility and non-utility plant	(13,763)	(27,420)
Net cash flows from investing activities	(13,763)	(27,420)
Cash Flows From Financing Activities:
Short-term borrowings (repayments), net	(5,000)	0
Short-term borrowings (repayments), affiliate, net	5,800	1,800
Net cash flows from financing activities	800	1,800
Change in Cash and Cash Equivalents	351	0
Cash and Cash Equivalents at Beginning of Period	1	1
Cash and Cash Equivalents at End of Period	352	1
Supplemental Cash Flow Disclosures:
Interest paid, net of amounts capitalized	1,664	73
Income taxes paid (refunded), net	0	(1,204)
Supplemental schedule of noncash investing activities:
Changes in accrued plant additions	$ (2,537)	$ (1,109)