Summary of Significant Accounting Policies (Schedule of Other Property Plant and Equipment) (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 1,224,153,000	[1]	$ 1,217,694,000	[1]
Accumulated depreciation property, plant and equipment, other assets	458,400,000		395,900,000
Drilling rigs owned	15
Fracture Stimulation Fleets	11
Proved and Unproved Sand Leaseholds [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	451,384,000	[2]	457,033,000	[2]
Wells and Related Equipment and Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	313,165,000	[3]	385,887,000	[3]
Land and Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	344,554,000		259,629,000
Transportation Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	41,397,000		44,928,000
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	47,905,000		43,614,000
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	25,748,000		26,603,000
Sendero [Member] | Wells and Related Equipment and Facilities [Member]
Property, Plant and Equipment [Line Items]
Assets Held-for-sale, Property, Plant and Equipment	$ 17,900,000

[1] (a)At December 31, 2013 and 2012, other property and equipment was net of accumulated depreciation of $458.4 million and $395.9 million, respectively.

[2] (b)Includes sand mines, sales facilities and unproved leaseholds that primarily provide the Company and other unrelated customers with proppant used in the fracture stimulation of oil and gas wells.

[3] (c)Includes drilling rigs, well servicing rigs and equipment and fracture stimulation equipment including assets owned by subsidiaries that provide drilling, pumping and well services on Company-operated properties. As of December 31, 2013, the Company owned 15 drilling rigs, eleven fracture stimulation fleets and other oilfield services equipment, including pulling units, fracture stimulation tanks, water transport trucks, hot oilers, blowout preventers, construction equipment and fishing tools. During December 2013, the Company committed to a plan to sell its majority interest in Sendero Drilling Company, LLC ("Sendero"), which owns the Company's 15 vertical drilling rigs, to Sendero's minority interest owner. Associated therewith, the Company has classified the assets and liabilities of Sendero, including $17.9 million of drilling rigs, as assets held for sale in the accompanying consolidated balance sheet as of December 31, 2013. See Note C for additional information.