Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)		1 Months Ended	3 Months Ended		9 Months Ended	12 Months Ended
	Mar. 18, 2015	Feb. 28, 2014	Dec. 31, 2015	Sep. 30, 2015	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Feb. 15, 2011
Summary Of Significant Accounting Policies [Line Items]
Deferred debt costs, net of accumulated amortization			$ 26,600,000			$ 26,600,000	$ 25,700,000
Accumulated amortization of deferred debt costs			13,500,000			13,500,000	10,400,000
Amortization of deferred financing costs						$ 3,622,000	3,176,000	$ 3,102,000
Shares granted		283,223				888,104
Impairment loss			0		$ 81,900,000
Trade names value			$ 1,900,000			$ 1,900,000	1,900,000
Amortization expense of intangible assets						$ 8,900,000	$ 8,600,000	$ 8,400,000
Customer Relationships
Summary Of Significant Accounting Policies [Line Items]
Amortization period of intangible assets, in years						15 years
Noncompete Agreements
Summary Of Significant Accounting Policies [Line Items]
Amortization period of intangible assets, in years						5 years
Rig Engineering Plans
Summary Of Significant Accounting Policies [Line Items]
Amortization period of intangible assets, in years						15 years
Well service units and equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives						3 years
Well service units and equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives						15 years
7.75% Senior Notes due 2019
Summary Of Significant Accounting Policies [Line Items]
Interest rate			7.75%			7.75%			7.75%
7.75% Senior Notes due 2022
Summary Of Significant Accounting Policies [Line Items]
Interest rate			7.75%			7.75%
Amended Revolving Credit Facility
Summary Of Significant Accounting Policies [Line Items]
Amortization of deferred financing costs				$ 508,000
Stock Options | Minimum
Summary Of Significant Accounting Policies [Line Items]
Vesting periods						3 years
Stock Options | Maximum
Summary Of Significant Accounting Policies [Line Items]
Vesting periods						5 years
Phantom Stock Awards [Member]
Summary Of Significant Accounting Policies [Line Items]
Target number of shares to be issued	704,089
Percentage of target number of performance-based awards will be earned			66.70%	66.70%	66.70%	66.70%
Shares granted					654,500	654,500
Vesting periods						3 years
Phantom Stock Awards [Member] | Minimum
Summary Of Significant Accounting Policies [Line Items]
Percentage of target number of shares to be issued	0.00%
Phantom Stock Awards [Member] | Maximum
Summary Of Significant Accounting Policies [Line Items]
Percentage of target number of shares to be issued	150.00%