Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Tables)

v3.3.1.900
Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2015
Accounting Policies [Abstract]  
Summary of Significant Total Accounts and Notes Receivable
The components of our accounts and notes receivable, net of allowance for bad debt balance are as follows:
 
December 31,
Dollars in thousands
2015
 
2014
Trade
$
183,299

 
$
281,640

Notes receivable
500

 
500

Allowance for bad debt(1)
(8,694
)
 
(11,188
)
Total accounts and notes receivable, net of allowance for bad debt
$
175,105

 
$
270,952

(1)
Additional information on the allowance for bad debt for the years ended December 31, 2015, 2014 and 2013 is reported on Schedule II — Valuation and Qualifying Accounts.
Summary of Depreciable Lives for Different Categories of Property Plant and Equipment
Depreciable lives for different categories of property, plant and equipment are as follows:
Land drilling equipment
  
3 to 20 years
Barge drilling equipment
  
3 to 20 years
Drill pipe, rental tools and other
  
4 to 15 years
Buildings and improvements
  
5 to 30 years