Rendering

Component: (Network and Table)
Network
2307301 - Disclosure - Asset Retirement Obligations (Tables)
(http://www.mdu.com/role/AssetRetirementObligationsTables)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000067716 (http://www.sec.gov/CIK)
Asset Retirement Obligation [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
Asset Retirement Obligation [Abstract]
 
Reconciliation of the company's asset retirement obligation
A reconciliation of the Company's liability, which is included in other accrued liabilities and deferred credits and other liabilities - other on the Consolidated Balance Sheets, for the years ended December 31 was as follows:
 
2016

2015

 
(In thousands)
Balance at beginning of year
$
242,224

$
27,211

Liabilities incurred
15,114

2,751

Liabilities settled
(4,338
)
(1,708
)
Accretion expense
13,918

2,134

Revisions in estimates
48,052

211,836

Balance at end of year
$
314,970

$
242,224