XML 60 R40.htm IDEA: XBRL DOCUMENT v3.4.0.3
Commitments and Contingencies (Details-2) - Natural Gas, Transportation and Storage [Member]
$ in Thousands
Mar. 31, 2016
USD ($)
[1]
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2016 $ 14,000
Purchase obligation, 2017 24,902
Purchase obligation, 2018 24,833
Purchase obligation, 2019 23,048
Purchase obligation, 2020 $ 16,274
[1] MGE's natural gas transportation and storage contracts require fixed monthly payments for firm supply pipeline transportation and storage capacity. The pricing components of the fixed monthly payments for the transportation and storage contracts are established by FERC but may be subject to change.