Rendering

Component: (Network and Table)
Network
2302302 - Disclosure - Significant Accounting Policies (Tables)
(http://www.northwesternenergy.com/role/SignificantAccountingPoliciesTables)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000073088 (http://www.sec.gov/CIK)
Accounting Policies [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
Accounting Policies [Abstract]
 
Inventories
Inventories are stated at average cost. Inventory consisted of the following (in thousands):

 
December 31,
 
2016
 
2015
Materials and supplies                                                                                   
$31,602
 
$31,789
Storage gas and fuel                                                                                   
17,604
 
21,669
Total Inventory
$49,206
 
$53,458
  
Other Noncurrent Liabilties
Other noncurrent liabilities consisted of the following (in thousands):

 
December 31,
 
2016
 
2015
Future QF obligation, net                                                                                   
$134,324
 
$138,310
Pension and other employee benefits                                                                                   
120,122
 
131,887
Environmental                                                                                   
30,501
 
30,226
Customer advances                                                                                   
40,209
 
36,046
Asset retirement obligations
39,402
 
35,532
Other                                                                                   
55,213
 
46,569
 Total
$419,771
 
$418,570
  
Supplemental Cash Flow Information
Supplemental Cash Flow Information

 
Year Ended December 31,
 
2016
 
2015
 
2014
 
 
 
(in thousands)
 
 
Cash (received) paid for:
 
 
 
 
 
Income taxes
$
(2,922
)
 
$
(1,284
)
 
$
35

Interest
84,953

 
81,572

 
63,482

Significant non-cash transactions:
 
 
 
 
 
Capital expenditures included in trade accounts payable
13,783

 
12,834

 
8,555