Fair Value of Financial Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value of Financial Assets and Liabilities

Schedule of fair value of long-term debt, including current maturities, and advances for construction

	June 30, 2013
			Fair Value
	Cost		Level 1		Level 2		Level 3		Total
Long -term debt, including current maturities	$	478,745	$	—	$	571,083	$	—	$	571,083
Advances for construction	186,202		—		71,801		—		71,801
Total	$	664,947	$	—	$	642,884	$	—	$	642,884

	December 31, 2012
			Fair Value
	Cost		Level 1		Level 2		Level 3		Total
Long -term debt, including current maturities	$	481,250	$	—	$	613,211	$	—	$	613,211
Advances for construction	187,584		—		70,914		—		70,914
Total	$	668,834	$	—	$	684,125	$	—	$	684,125