LONG-TERM DEBT: Long-term Debt Level 3 (Tables)

12 Months Ended

Dec. 31, 2015

Debt Instrument [Line Items]

Schedule of Long-term Debt Instruments

The following table summarizes IDACORP's and Idaho Power's long-term debt at December 31 (in thousands of dollars):

	2015			2014
First mortgage bonds:
6.025% Series due 2018	$	—		$	120,000
6.15% Series due 2019	100,000			100,000
4.50% Series due 2020	130,000			130,000
3.40% Series due 2020	100,000			100,000
2.95% Series due 2022	75,000			75,000
2.50% Series due 2023	75,000			75,000
6% Series due 2032	100,000			100,000
5.50% Series due 2033	70,000			70,000
5.50% Series due 2034	50,000			50,000
5.875% Series due 2034	55,000			55,000
5.30% Series due 2035	60,000			60,000
6.30% Series due 2037	140,000			140,000
6.25% Series due 2037	100,000			100,000
4.85% Series due 2040	100,000			100,000
4.30% Series due 2042	75,000			75,000
4.00% Series due 2043	75,000			75,000
3.65% Series Due 2045	250,000			—
Total first mortgage bonds	1,555,000			1,425,000
Pollution control revenue bonds:
5.15% Series due 2024(1)	49,800			49,800
5.25% Series due 2026(1)	116,300			116,300
Variable Rate Series 2000 due 2027	4,360			4,360
Total pollution control revenue bonds	170,460			170,460
American Falls bond guarantee	19,885			19,885
Milner Dam note guarantee	2,127			3,191
Unamortized issuance costs and discounts	(20,998		)	(18,850		)
Total IDACORP and Idaho Power outstanding debt(2)	1,726,474			1,599,686
Current maturities of long-term debt	(1,064		)	(1,064		)
Total long-term debt	$	1,725,410		$	1,598,622

⁽¹⁾ Humboldt County and Sweetwater County Pollution Control Revenue Bonds are secured by the first mortgage, bringing the total first mortgage bonds outstanding at December 31, 2015 to $1.721 billion.

⁽²⁾ At December 31, 2015 and 2014, the overall effective cost of Idaho Power's outstanding debt was 4.96 percent and 5.19 percent, respectively.

Schedule of Maturities of Long-term Debt

At December 31, 2015, the maturities for the aggregate amount of IDACORP and Idaho Power long-term debt outstanding were as follows (in thousands of dollars):

2016		2017		2018		2019		2020		Thereafter
$	1,064	$	1,064	$	—	$	100,000	$	230,000	$	1,415,344