Organization and Summary of Significant Accounting Policies (Changes in Allowance for Doubtful Accounts) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accounting Policies [Line Items]
Accounts receivable age, individually reviewed for collectibility	90
Allowance for Doubtful Accounts [Member]
Accounting Policies [Line Items]
Valuation Allowances and Reserves, Balance	$ 1,356	$ 1,044	$ 994	$ 712
Valuation Allowances and Reserves, Increase (Decrease) Charged to Cost and Expense	(801)	(76)	(787)
Valuation Allowances and Reserves, Deductions	$ 489	$ 26	$ 505
Drilling Services Segment [Member]
Accounting Policies [Line Items]
Payment Term in Days for services invoiced, Average	30
Payment Term in Days for services invoiced, Maximum	90
Production Services Segment [Member]
Accounting Policies [Line Items]
Payment Term in Days for services invoiced, Average	30