Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v2.4.0.8
Subsequent Events (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended 0 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Jul. 31, 2014
Subsequent Event [Member]
Jul. 23, 2014
Black Bison Water Services LLC [Member]
Subsequent Event [Member]
Mar. 13, 2014
Line of Credit [Member]
Black Bison Water Services LLC [Member]
Jul. 23, 2014
Line of Credit [Member]
Black Bison Water Services LLC [Member]
Subsequent Event [Member]
Mar. 13, 2014
Line of Credit [Member]
Black Bison Water Services LLC [Member]
Subsequent Event [Member]
Subsequent Event [Line Items]                  
Common Stock, Dividends, Per Share, Declared $ 0.129 $ 0.125 $ 0.254 $ 0.25 $ 0.13        
Maximum borrowing base of revolving note payable           $ 3,300 $ 11,500 $ 12,000 $ 11,500