Debt (Tables)

12 Months Ended

Dec. 31, 2016

Debt [Abstract]

Schedule Of Debt Issuance Costs Associated With Long-Term Obligations

Long-term obligations at December 31 are as follows:	2016		2015
2011 CoBank Note, 2.78% variable rate at redemption, with interest payable monthly and principal due annually beginning in 2003	$	0	$	24,941,165
2011 Series A Bond of 4.20%, maturing in 2031, with interest payable semi-annually March 15 and September 15 and principal due annually beginning in 2012		67,500,000		72,000,000
2011 Series A Bond of 4.75%, maturing in 2041, with interest payable semi-annually March 15 and September 15 and principal due annually beginning in 2012		154,166,665		160,333,332
2012 Series A Bond of 4.01%, maturing in 2032, with interest payable semi-annually March 15 and September 15 and principal due annually beginning in 2013		60,000,000		63,750,000
2012 Series A Bond of 4.41%, maturing in 2042, with interest payable semi-annually March 15 and September 15 and principal due annually between 2013 and 2020 and between 2032 and 2042		95,000,000		102,000,000
2012 Series A Bond of 4.78%, maturing in 2042, with interest payable semi-annually March 15 and September 15 and principal due annually beginning in 2023		50,000,000		50,000,000
2016 CoBank Note, 2.58% fixed rate note maturing in 2031, with interest and principal due quarterly beginning in 2016		43,776,000		0
Total long-term obligations	$	470,442,665	$	473,024,497
Less current installments		24,836,667		24,115,980
Less unamortized debt issuance costs		2,715,745		2,680,897
Long-term obligations, excluding current installments	$	442,890,253	$	446,227,620

Schedule Of Maturities Of Long-Term Obligations

Year ending December 31		2011 Series A Bonds		2016 CoBank Note		2012 Series A Bonds		Total
2017	$	10,666,667	$	3,420,000	$	10,750,000	$	24,836,667
2018		10,666,667		3,192,000		10,750,000		24,608,667
2019		10,666,667		3,192,000		10,750,000		24,608,667
2020		10,666,667		3,420,000		10,750,000		24,836,667
2021		10,666,667		3,648,000		3,750,000		18,064,667
Thereafter		168,333,330		26,904,000		158,250,000		353,487,330
	$	221,666,665	$	43,776,000	$	205,000,000	$	470,442,665

Schedule Of Average Commercial Paper Balances Outstanding And Weighted Average Interest Rates

Month	Average Balance		Weighted Average Interest Rate	Month	Average Balance		Weighted Average Interest Rate
January 2016	$	16.1	0.61	July 2016	$	47.3	0.66
February 2016	$	16.9	0.60	August 2016	$	54.2	0.63
March 2016	$	30.5	0.60	September 2016	$	60.0	0.65
April 2016	$	55.1	0.60	October 2016	$	63.5	0.65
May 2016	$	78.2	0.60	November 2016	$	60.8	0.65
June 2016	$	76.0	0.62	December 2016	$	63.7	0.86

Schedule Of Additional Information Regarding Series A Bonds

	Maturing March 15,	Average Life (Years)	Interest Rate		Issue Amount		Carrying Value
2011 Series A, Tranche A	2031	7.2	4.20	%	$	90,000	$	67,500
2011 Series A, Tranche B	2041	12.2	4.75	%		185,000		154,167
2012 Series A, Tranche A	2032	7.7	4.01	%		75,000		60,000
2012 Series A, Tranche B	2042	14.8	4.41	%		125,000		95,000
2012 Series A, Tranche C	2042	15.7	4.78	%		50,000		50,000
2016 CoBank Note	2031	6.2	2.58	%		45,600		43,776
Total					$	570,600	$	470,443