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Organization and Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Drilling Long-Lived Assets, by Status [Table Text Block]
The following is a summary of our drilling rig counts as of December 31, 2014 and February 1, 2015.
 
 
Drilling Rigs Owned
 
Drilling Rigs Held for Sale
 
Drilling Rig Fleet Count
As of December 31, 2014
 
62

 
(9
)
 
53

As of February 1, 2015
 
59

 
(12
)
 
47

The following is a summary of our drilling rig counts as of December 31, 2014 and February 1, 2015.
 
 
Drilling Rigs Owned
 
Drilling Rigs Held for Sale
 
Drilling Rig Fleet Count
As of December 31, 2014
 
62

 
(9
)
 
53

As of February 1, 2015
 
59

 
(12
)
 
47

The following is a summary of our drilling rig counts as of December 31, 2014 and February 1, 2015.
 
 
Drilling Rigs Owned
 
Drilling Rigs Held for Sale
 
Drilling Rig Fleet Count
As of December 31, 2014
 
62

 
(9
)
 
53

As of February 1, 2015
 
59

 
(12
)
 
47
Schedule of Long-Lived Assets, by Reporting Segment
As of February 1, 2015, the drilling rigs in our fleet are assigned to the following divisions:
Drilling Division
Rig Count
South Texas
13

West Texas
10

North Dakota
9

Utah
4

Appalachia
3

Colombia
8

 
47

As of February 1, 2015, the drilling rigs in our fleet are assigned to the following divisions:
Drilling Division
Rig Count
South Texas
13

West Texas
10

North Dakota
9

Utah
4

Appalachia
3

Colombia
8

 
47
Schedule of Drilling Contracts [Table Text Block]
Drilling Contracts
Our drilling contracts generally provide for compensation on either a daywork or turnkey basis. Contract terms generally depend on the complexity and risk of operations, the on-site drilling conditions, the type of equipment used, and the anticipated duration of the work to be performed. Spot market contracts generally provide for the drilling of a single well and typically permit the client to terminate on short notice. We enter into longer-term drilling contracts for our newly constructed rigs and/or during periods of high rig demand. Currently, we have contracts with original terms of six months to four years in duration.
As of February 1, 2015, we have 29 drilling rigs earning under term contracts, which if not renewed prior to the end of their terms, will expire as follows:
 
 
 
 
Term Contract Expiration by Period
 
 
Total
Term Contracts
 
Within
6 Months
 
6 Months
to 1 Year
 
1 Year to
18 Months
 
18 Months
to 2 Years
United States
 
25

 
13

 
6

 
4

 
2

Colombia
 
4

 
4

 
—

 
—

 
—

 
 
29

 
17

 
6

 
4

 
2
Schedule of Allowance for Doubtful Accounts
The changes in our allowance for doubtful accounts consist of the following (amounts in thousands):
 
Year ended December 31,
 
2014
 
2013
 
2012
Balance at beginning of year
$
1,356

 
$
1,044

 
$
994

Increase in allowance charged to expense
1,445

 
801

 
76

Accounts charged against the allowance
(254
)
 
(489
)
 
(26
)
Balance at end of year
$
2,547

 
$
1,356

 
$
1,044
Schedule of Intangible Assets
Our intangible assets consist of the following components as of December 31, 2014 and 2013 (amounts in thousands):
 
December 31,
 
2014
 
2013
Cost:
 
 
 
Client relationships
$
63,168

 
$
63,168

Non-compete agreements
1,355

 
1,355

Accumulated amortization:
 
 
 
Client relationships
(39,256
)
 
(31,584
)
Non-compete agreements
(1,044
)
 
(745
)
 
$
24,223

 
$
32,194