Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Tables)

v2.4.0.8
Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2013
Accounting Policies [Abstract]  
Summary of Significant Total Accounts and Notes Receivable
 
December 31,
 
2013
 
2012
 
(Dollars in Thousands)
Trade
$
270,498

 
$
176,082

Notes receivable
244

 
650

Allowance for doubtful accounts(1)
(12,853
)
 
(8,117
)
Total accounts and notes receivable, net of allowance for bad debt
$
257,889

 
$
168,615


(1)
Additional information on the allowance for doubtful accounts for the years ended December 31, 2013, 2012 and 2011 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 10 years
Buildings and improvements
  
5 to 30 years