Parker Drilling Co Of Oklahoma Inactive S-423 Jan 14Registration of securities issued in business combination transactionsFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2013
Entity Information [Line Items]	'
Document Type	'S-4
Amendment Flag	'false
Document Period End Date	30-Sep-13
Trading Symbol	'PKD
Entity Registrant Name	'PARKER DRILLING CO /DE/
Entity Central Index Key	'0000076321
Entity Filer Category	'Accelerated Filer

CONSOLIDATED_CONDENSED_STATEME

CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended				9 Months Ended				12 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues	$237,762		$165,301		$630,918		$520,795		$677,982	$686,646	$659,475
Expenses:	'		'		'		'		'	'	'
Operating expenses	153,741		101,484		414,336		300,942		414,064	418,144	471,278
Depreciation and amortization	35,882		29,779		97,674		85,357		113,017	112,136	115,030
Total expenses	189,623		131,263		512,010		386,299		527,081	530,280	586,308
Total operating gross margin	48,139		34,038		118,908		134,496		150,901	156,366	73,167
General and administration expense	-14,188	[1]	-8,905	[1]	-49,449	[1]	-21,822	[1]	-46,052	-31,314	-30,728
Impairments and other charges	'		'		'		'		'	-170,000	'
Provision for reduction in carrying value of certain assets	'		'		'		'		0	-1,350	-1,952
Gain on disposition of assets, net	1,094		606		2,759		2,466		1,974	3,659	4,620
Total operating income (loss)	35,045		25,739		72,218		115,140		106,823	-42,639	45,107
Other income and (expense):	'		'		'		'		'	'	'
Interest expense	-13,127		-8,171		-33,874		-25,133		-33,542	-22,594	-26,805
Interest income	130		30		2,392		109		153	256	257
Loss on extinguishment of debt	-5,218		-117		-5,218		-1,766		-2,130	'	-7,209
Change in fair value of derivative positions	-5,218		19		54		8		55	-110	'
Other	400		26		333		62		-382	-325	155
Total other expense	-17,815		-8,213		-36,313		-26,720		-35,846	-22,773	-33,602
Income (loss) before income taxes	17,230		17,526		35,905		88,420		70,977	-65,412	11,505
Income tax expense (benefit):	'		'		'		'		'	'	'
Current tax expense	'		'		'		'		18,042	33,608	27,521
Deferred tax expense (benefit)	'		'		12,872		8,403		15,837	-48,375	-1,308
Income tax expense	9,112		6,695		18,841		31,155		33,879	-14,767	26,213
Net income (loss)	8,118		10,831		17,064		57,265		37,098	-50,645	-14,708
Less: Net income (loss) attributable to noncontrolling interest	148		-105		221		-146		-215	-194	-247
Net income (loss) attributable to controlling interest	$7,970		$10,936		$16,843		$57,411		$37,313	($50,451)	($14,461)
Basic earnings per share	$0.07		$0.09		$0.14		$0.49		$0.32	($0.43)	($0.13)
Diluted earnings per share	$0.07		$0.09		$0.14		$0.48		$0.31	($0.43)	($0.13)
Number of common shares used in computing earnings per share:	'		'		'		'		'	'	'
Basic	119,990,196		118,109,214		119,443,260		117,458,365		117,721,135	116,081,590	114,258,965
Diluted	121,674,591		119,201,019		121,693,781		118,810,195		119,093,590	116,081,590	114,258,965

[1]	General and administration expenses for field operations are included in operating expenses.

CONSOLIDATED_CONDENSED_BALANCE

CONSOLIDATED CONDENSED BALANCE SHEETS (USD $)	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Current assets:	'	'	'
Cash and cash equivalents	$162,457	$87,886	$97,869
Accounts and notes receivable, net	249,623	168,562	183,923
Rig materials and supplies	40,202	28,860	29,947
Deferred costs	13,583	1,089	3,249
Deferred income taxes	13,473	8,742	6,650
Other tax assets	18,433	33,524	25,358
Assets held for sale	7,485	6,800	5,315
Other current assets	20,906	12,821	15,302
Total current assets	526,162	348,284	367,613
Property, plant and equipment, at cost:	'	'	'
Drilling equipment	'	1,165,924	1,094,366
Rental tools	'	337,874	310,429
Buildings, land and improvements	'	38,736	33,817
Other	'	56,819	57,111
Construction in progress	'	190,445	194,362
Property plant and equipment gross	'	1,789,798	1,690,085
Less accumulated depreciation and amortization	1,087,279	1,029,712	970,276
Property plant and equipment net	858,672	789,123	719,809
Other assets:	'	'	'
Deferred income taxes	107,763	95,295	108,311
Other noncurrent assets	42,783	23,031	'
Rig materials and supplies	'	8,980	10,395
Debt issuance costs	'	8,863	7,025
Other assets	'	3,403	3,093
Total other assets	'	116,541	128,824
Total assets	1,535,380	1,255,733	1,216,246
Current liabilities:	'	'	'
Current portion of long-term debt	0	10,000	145,723
Accounts payable and accrued liabilities	191,229	137,746	135,250
Accrued income taxes	7,261	4,120	4,837
Total current liabilities	198,490	151,866	285,810
Accounts payable	'	62,090	76,706
Accrued liabilities	'	75,656	58,544
Long-term debt	653,968	469,205	337,000
Other long-term liabilities	24,048	23,182	33,452
Long-term deferred tax liability	39,084	20,847	15,934
Commitments and contingencies	'	'	'
Stockholders' equity:	'	'	'
Common stock	20,050	19,818	19,508
Capital in excess of par value	654,750	646,217	637,042
Accumulated other comprehensive income	957	0	'
Accumulated deficit	-57,788	-74,631	-111,944
Total controlling interest stockholders' equity	617,969	591,404	544,606
Preferred stock,value	'	'	'
Noncontrolling interest	1,821	-771	-556
Total equity	619,790	590,633	544,050
Total liabilities and stockholders' equity	1,535,380	1,255,733	1,216,246
Scenario, Previously Reported [Member]	'	'	'
Current assets:	'	'	'
Assets held for sale	'	11,550	'
Total current assets	'	353,034	'
Property, plant and equipment, at cost:	'	'	'
Less accumulated depreciation and amortization	'	1,003,640	'
Property plant and equipment net	'	786,158	'
Current liabilities:	'	'	'
Long-term deferred tax liability	'	$20,847	'

CONSOLIDATED_CONDENSED_BALANCE1

CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for bad debts	$11,156	$8,117	$1,544
Preferred stock, par value	'	$1	$1
Accumulated depreciation and amortization on property, plant and equipment	$1,087,279	$1,029,712	$970,276
Preferred stock, shares authorized	'	1,942,000	1,942,000
Preferred stock, shares outstanding	'	'	'
Common stock, par value	'	$0.16	$0.16
Common stock, shares authorized	'	280,000,000	280,000,000
Common stock, shares issued	'	118,968,396	117,061,203
Common stock, shares outstanding	'	118,968,396	117,061,203

CONSOLIDATED_CONDENSED_STATEME1

CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:	'	'	'	'	'
Net income (loss)	$17,064	$57,265	$37,098	($50,645)	($14,708)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'	'	'	'
Depreciation and amortization	97,674	85,357	113,017	112,136	115,030
Impairment of property, plant and equipment	'	'	'	170,000	'
Loss on extinguishment of debt	5,218	1,766	2,130	'	7,209
Gain on disposition of assets	-2,759	-2,466	-1,974	-3,659	-4,620
Deferred tax expense (benefit)	12,872	8,403	15,837	-48,375	-1,308
Provision for reduction in carrying value of certain assets	'	'	0	1,350	1,952
Expenses not requiring cash	9,928	15,724	22,600	12,833	14,829
Change in assets and liabilities:	'	'	'	'	'
Accounts and notes receivable	-28,605	24,648	15,241	-6,841	20,752
Rig materials and supplies	'	'	344	-913	-856
Other current assets	'	'	-4,313	63,816	-2,969
Accounts payable and accrued liabilities	'	'	-2,657	-24,908	-10,868
Accrued income taxes	2,877	-3,049	-6,102	2,141	-4,124
Change in other assets	-1,346	564	-1,522	-1,050	3,231
Change in liabilities	12,412	-10,185	-2,657	-22,767	-14,992
Net cash provided by (used in) operating activities	125,335	178,027	189,699	225,885	123,550
Cash flows from investing activities:	'	'	'	'	'
Capital expenditures	-102,856	-147,658	-191,543	-190,399	-219,184
Proceeds from the sale of assets	5,533	3,496	3,937	5,535	6,475
Proceeds from insurance claims	'	'	'	250	'
Acquisition of ITS, net of cash acquired	-117,991	'	'	'	'
Net cash (used in) investing activities	-215,314	-144,162	-187,606	-184,614	-212,709
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'	'	'
Proceeds from issuance of debt	350,000	130,000	130,000	50,000	300,000
Proceeds from draw on revolver credit facility	'	'	7,000	'	25,000
Repayments of long term debt	-125,000	-125,000	-125,000	'	-225,000
Repayments of term loan	-50,000	-18,000	-18,000	-21,000	-12,000
Repayments of revolver	'	'	'	-25,000	-42,000
Payments of debt issuance costs	-10,981	-3,516	-4,859	-504	-7,976
Payments of debt extinguishment costs	'	-519	-555	'	-7,466
Proceeds from stock options exercised	'	'	'	183	26
Excess tax benefit (expense) from stock-based compensation	531	-572	-662	1,488	1,203
Net cash provided by (used in) financing activities	164,550	-17,607	-12,076	5,167	31,787
Net increase (decrease) in cash and cash equivalents	74,571	16,258	-9,983	46,438	-57,372
Cash and cash equivalents at beginning of year	87,886	97,869	97,869	51,431	108,803
Cash and cash equivalents at end of year	162,457	114,127	87,886	97,869	51,431
Supplemental cash flow information:	'	'	'	'	'
Interest paid	22,845	17,492	37,405	32,785	30,377
Income taxes paid	$11,238	$36,498	$40,234	$21,742	$41,024

CONSOLIDATED_STATEMENT_OF_STOC

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (USD $)	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Accumulated Deficit [Member]	Total Controlling Stockholders' Equity [Member]	Noncontrolling Interest [Member]
In Thousands	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Accumulated Deficit [Member]	Total Controlling Stockholders' Equity [Member]	Noncontrolling Interest [Member]
Balances at Dec. 31, 2009	$595,899	$19,374	$623,557	($47,032)	$595,899	'
Balances, shares at Dec. 31, 2009	'	116,239	'	'	'	'
Activity in employees' stock plans	137	23	114	'	137	'
Activity in employees' stock plans, shares	'	130	'	'	'	'
Excess tax benefit from stock based compensation	1,203	'	1,203	'	1,203	'
Amortization of restricted stock plan compensation	5,535	'	5,535	'	5,535	'
Net income (total comprehensive income of $14,708)	-14,708	'	'	-14,461	-14,461	-247
Balances, December 31, 2012 at Dec. 31, 2010	588,066	19,397	630,409	-61,493	588,313	-247
Balances, shares at Dec. 31, 2010	'	116,369	'	'	'	'
Activity in employees' stock plans	-232	111	-343	'	-232	'
Activity in employees' stock plans, shares	'	692	'	'	'	'
Excess tax benefit from stock based compensation	988	'	988	'	988	'
Amortization of restricted stock plan compensation	5,988	'	5,988	'	5,988	'
Net income (total comprehensive income of $14,708)	-50,645	'	'	-50,451	-50,451	-194
Other, net	-115	'	'	'	'	-115
Balances, December 31, 2012 at Dec. 31, 2011	544,050	19,508	637,042	-111,944	544,606	-556
Balances, shares at Dec. 31, 2011	'	117,061	'	'	'	'
Activity in employees' stock plans	2,930	310	2,620	'	2,930	'
Activity in employees' stock plans, shares	'	1,907	'	'	'	'
Excess tax benefit from stock based compensation	-662	'	-662	'	-662	'
Amortization of restricted stock plan compensation	7,217	'	7,217	'	7,217	'
Net income (total comprehensive income of $14,708)	37,098	'	'	37,313	37,313	-215
Balances, December 31, 2012 at Dec. 31, 2012	$590,633	$19,818	$646,217	($74,631)	$591,404	($771)
Balances, shares at Dec. 31, 2012	'	118,968	'	'	'	'

CONSOLIDATED_STATEMENT_OF_STOC1

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Total comprehensive income	$37,098	($50,645)	$14,708
Accumulated Deficit [Member]	'	'	'
Total comprehensive income	37,098	-50,645	14,708
Total Controlling Stockholders' Equity [Member]	'	'	'
Total comprehensive income	37,098	-50,645	14,708
Noncontrolling Interest [Member]	'	'	'
Total comprehensive income	'	($50,645)	'

CONSOLIDATED_CONDENSED_STATEME2

CONSOLIDATED CONDENSED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Comprehensive income:	'	'	'	'	'	'	'
Net income	$8,118	$10,831	$17,064	$57,265	$37,098	($50,645)	($14,708)
Other comprehensive gain, net of tax:	'	'	'	'	'	'	'
Currency translation difference on related borrowings	-577	0	-1,542	0	'	'	'
Currency translation difference on foreign currency net investments	2,098	0	2,499	0	'	'	'
Total other comprehensive gain, net of tax:	1,521	0	957	0	'	'	'
Comprehensive income	9,639	10,831	18,021	57,265	37,098	-50,645	14,708
Comprehensive (income) attributable to noncontrolling interest	-53	0	-83	0	'	'	'
Comprehensive income attributable to controlling interest	$9,586	$10,831	$17,938	$57,265	'	'	'

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
Summary of Significant Accounting Policies	Dec. 31, 2012
Summary of Significant Accounting Policies	'
	Note 1 — Summary of Significant Accounting Policies
	Nature of Operations — Parker Drilling, together with its subsidiaries (the Company), is a worldwide provider of contract drilling and drilling-related services and currently we operate in 12 countries. We have operated in over 50 foreign countries and the United States since beginning operations in 1934, making us among the most geographically experienced drilling contractors in the world. We have extensive experience and expertise in drilling geologically difficult wells and in managing the logistical and technological challenges of operating in remote, harsh and ecologically sensitive areas. We believe our quality, health, safety and environmental practices are leaders in our industry. Our rental tools subsidiary specializes in oil and natural gas drilling rental tools providing high-quality, reliable equipment, such as drill pipe, heavy-weight drill pipe, tubing, high-torque connections, BOPs and drill collars used for drilling, workover and production applications.
	Our U.S. barge drilling business operates barge rigs drill for natural gas, oil, and a combination of oil and natural gas in the shallow waters in and along the inland waterways of Louisiana, Alabama, and Texas. Our international drilling business provides extensive experience and expertise in drilling geologically difficult wells and in managing the logistical and technological challenges of operating in remote, harsh and ecologically sensitive areas. Additionally, our international drilling business includes operations and maintenance and other project management services, such as labor, maintenance, and logistics for operators who own their own drilling rigs, but choose Parker Drilling to operate the rigs for them. At December 31, 2012, our marketable rig fleet consisted of 14 barge drilling rigs and 24 land rigs located in the United States, Latin America and the Eastern Hemisphere regions. Our Technical services business includes engineering and related project services during the concept development, pre-FEED, and FEED (Front End Engineering Design) phases of our customer owned drilling facility projects. As these projects mature, we continue providing the same services during the Engineering, Procurement, Construction and Installation (EPCI) phase.
	Consolidation — The consolidated financial statements include the accounts of the Company and subsidiaries in which we exercise control or have a controlling financial interest, including entities, if any, in which the Company is allocated a majority of the entity’s losses or returns, regardless of ownership percentage. If a subsidiary of Parker Drilling has a 50 percent interest in an entity but Parker Drilling’s interest in the subsidiary or the entity does not meet the consolidation criteria described above, then that interest is accounted for under the equity method.
	Noncontrolling Interest — We apply the accounting standards related to noncontrolling interests for ownership interests in our subsidiaries held by parties other than Parker Drilling. The entities that comprise the noncontrolling interest include Parker SMNG Drilling Limited Liability Company and Primorsky Drill Rig Services B.V. We report noncontrolling interest as equity on the consolidated balance sheets and report net income (loss) attributable to controlling interest and to noncontrolling interest separately on the consolidated statements of operations.
	Reclassifications — Certain reclassifications have been made to prior period amounts to conform with the current period presentation. These reclassifications did not have a material effect on our consolidated statements of operations, consolidated balance sheets or statements of cash flows.
	Revenue Recognition — Contract drilling revenues and expenses, comprised of daywork drilling contracts and engineering and related project service contracts, are recognized as services are performed and collection is reasonably assured. For certain contracts, we receive payments contractually designated for the mobilization of rigs and other drilling equipment. Mobilization payments received, and direct costs incurred for the mobilization, are deferred and recognized over the term of the related drilling contract; however, costs incurred to relocate rigs and other drilling equipment to areas in which a contract has not been secured are expensed as incurred. Reimbursements received for out-of-pocket expenses are recorded as both revenues and direct costs. For contracts that are terminated prior to the specified term, early termination payments received by us are recognized as revenues when all contractual requirements are met. Revenues from rental activities are recognized ratably over the rental term which is generally less than six months. Construction contract revenues and costs are recognized on a percentage of completion basis utilizing the cost-to-cost method.
	Reimbursable Costs — The Company recognizes reimbursements received for out-of-pocket expenses incurred as revenues and accounts for out-of-pocket expenses as direct operating costs. Such amounts totaled $44.9 million, $64.2 million, and $40.1 million during the years ended December 31, 2012, 2011, and 2010, respectively.
	Use of Estimates — The preparation of financial statements in accordance with U.S. GAAP requires us to make estimates and assumptions that affect our reported amounts of assets and liabilities, our disclosure of contingent assets and liabilities at the date of the financial statements, and our revenue and expenses during the periods reported. Estimates are typically used when accounting for certain significant items such as legal or contractual liability accruals, mobilization and deferred mobilization, revenue and cost accounting for projects that follow the percentage of completion method, self-insured medical/dental plans, and other items requiring the use of estimates. Estimates are based on a number of variables which may include third party valuations, historical experience, where applicable, and assumptions that we believe are reasonable under the circumstances. Due to the inherent uncertainty involved with estimates, actual results may differ from management estimates.
	During the third quarter of 2010, we corrected an accounting error relating to value added taxes (VAT) in our Western Kazakhstan branch (PDKBV). The cumulative effect of the error and related foreign currency translation impact overstated net income and retained earnings by $6.4 million over the period 2007 through 2009. The impact of the error was determined not to be material to our results of operations and financial position for any previously reported periods. Consequently, during the third quarter of 2010, the cumulative effect of this correction was recorded in operating expenses and is reflected in year to date operating expenses for the year ended December 31, 2010.
	Cash and Cash Equivalents — For purposes of the consolidated balance sheets and the consolidated statements of cash flows, the Company considers cash equivalents to be highly liquid debt instruments that have a remaining maturity of three months or less at the date of purchase.
	Accounts Receivable and Allowance for Doubtful Accounts — Trade accounts receivable are recorded at the invoice amount and generally do not bear interest. The allowance for doubtful accounts is our best estimate for losses that may occur resulting from disputed amounts and the inability of our customers to pay amounts owed. We estimate the allowance based on historical write-off experience and information about specific customers. We review individually, for collectability, all balances over 90 days past due as well as balances due from any customer with respect to which we have information leading us to believe that a risk exist for potential collection.
	Account balances are charged off against the allowance when we believe it is probable the receivable will not be recovered. We do not have any off-balance-sheet credit exposure related to customers.

			December 31,
			2012			2011
			(Dollars in Thousands)
	Trade		$	176,029		$	184,817
	Notes receivable			650			650
	Allowance for doubtful accounts(1)			(8,117	)		(1,544	)

	Total accounts and notes receivable, net of allowance for bad debt		$	168,562		$	183,923

	1)	Additional information on the allowance for doubtful accounts for the years ended December 31, 2012, 2011 and 2010 is reported on Schedule II — Valuation and Qualifying Accounts.
	Property, Plant and Equipment — We account for depreciation of property, plant and equipment on the straight line method over the estimated useful lives of the assets after provision for salvage value. Depreciation, for tax purposes, utilizes several methods of accelerated depreciation. Depreciable lives for different categories of property, plant and equipment are as follows:

	Land drilling equipment		3 to 20 years
	Barge drilling equipment		3 to 20 years
	Drill pipe, rental tools and other		4 to 7 years
	Buildings and improvements		15 to 30 years
	Annual Impairment Review — We review the carrying amounts of long-lived assets for potential impairment annually, typically during the fourth quarter, or when events occur or circumstances change that indicate the carrying value of such assets may not be recoverable. We determine recoverability by evaluating the undiscounted estimated future net cash flows. When impairment is indicated, we measure the impairment as the amount by which the assets’ carrying value exceeds its fair value. Management considers a number of factors such as estimated future cash flows from the assets, appraisals and current market value analysis in determining fair value. Assets are written down to fair value if the final estimate of current fair value is below the net carrying value.
	Capitalized Interest — Interest from external borrowings is capitalized on major projects until the assets are ready for their intended use. Capitalized interest is added to the cost of the underlying asset and is amortized over the useful lives of the assets in the same manner as the underlying assets. Capitalized interest costs reduce net interest expense in the consolidated statements of operations. During 2012, 2011 and 2010, we capitalized interest costs related to the construction of rigs of $10.2 million, $19.3 million and $13.5 million, respectively.
	Assets held for sale — We classify an asset as held for sale when the facts and circumstances meet the criteria for such classification, including the following: (a) we have committed to a plan to sell the asset, (b) the asset is available for immediate sale, (c) we have initiated actions to complete the sale, including locating a buyer, (d) the sale is expected to be completed within one year, (e) the asset is being actively marketed at a price that is reasonable relative to its fair value, and (f) the plan to sell is unlikely to be subject to significant changes or termination. At December 31, 2012 and 2011, we had net assets held for sale, included in current assets, in the amounts of $11.6 million and $5.3 million, respectively. For further information, see Note 4.
	Rig Materials and Supplies — Because our international drilling generally occurs in remote locations, making timely outside delivery of spare parts uncertain, a complement of parts and supplies is maintained either at the drilling site or in warehouses close to the operation. During periods of high rig utilization, these parts are generally consumed and replenished within a one-year period. During a period of lower rig utilization in a particular location, the parts, like the related idle rigs, are generally not transferred to other international locations until new contracts are obtained because of the significant transportation costs, that would result from such transfers. We classify those parts which are not expected to be utilized in the following year as long-term assets. Rig materials and supplies are valued at the lower of cost or market value.
	Deferred Costs — We defer costs related to rig mobilization and amortize such costs over the term of the related contract. The costs to be amortized within twelve months are classified as current.
	Debt Issuance Costs — We typically defer costs associated with debt financings and refinancing, and amortize those costs over the term of the related debt.
	Income Taxes — Income taxes are accounted for under the asset and liability method and have been provided based upon tax laws and rates in effect in the countries in which operations are conducted and income is earned. There is little or no expected relationship between the provision for or benefit from income taxes and income or loss before income taxes as the countries in which we operate have taxation regimes that vary not only with respect to nominal rate, but also in terms of the availability of deductions, credits, and other benefits. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which the temporary differences are expected to be recovered or settled and the effect of changes in tax rates is recognized in income in the period in which the change is enacted. Accordingly, the impact of the American Taxpayer Relief Act of 2012, which was enacted January 2, 2013, will be recognized in 2013, not 2012. The Company recognizes the effect of income tax positions only if those positions are more likely than not to be sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized and changes in recognition or measurement are reflected in the period in which the change in judgment occurs.
	Earnings (Loss) Per Share (EPS) — Basic earnings (loss) per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. The effects of dilutive securities, stock options, unvested restricted stock and convertible debt are included in the diluted EPS calculation, when applicable.
	Concentrations of Credit Risk — Financial instruments, that potentially subject the Company to concentrations of credit risk consist primarily of trade receivables with a variety of national and international oil and natural gas companies. We generally do not require collateral on our trade receivables.
	At December 31, 2012 and 2011, we had deposits in domestic banks in excess of federally insured limits of approximately $12.2 million and $10.2 million, respectively. In addition, we had deposits in foreign banks, which were not insured at December 31, 2012 and 2011 of $34.5 million and $38.4 million, respectively.
	Our customer base consists of major, independent and national oil and natural gas companies and integrated service providers. We depend on a limited number of significant customers. Our two largest customers, Exxon Neftegas Limited (ENL) and Schlumberger, constituted 11.8 percent and 10.4 percent, respectively of our revenues for 2012.
	Construction Contract — For the periods reported, our construction contract business included only the drilling rig construction project for BP. In November 2010, our customer, BP, informed us that it was suspending construction on the project to review the rig’s engineering and design, including its safety systems. The Liberty rig construction contract was a fixed fee and reimbursable contract that we accounted for on a percentage of completion basis. As of December 31, 2011 and 2010, we had recognized $335.5 million and $325.9 million in project-to-date revenues, respectively. We have recognized the entire $11.7 million fixed fee margin on the contract.
	The Liberty rig construction contract expired on February 8, 2011 prior to completion of the rig. Before expiration of the construction contract, BP identified several areas of concern relating to design, construction and invoicing for which it asked us to provide explanations and documentation, and we have done so. Although we provided BP with the requested information, we do not know when or how these issues will be resolved with our client.
	After expiration of the construction contract, the Company and BP continued activities to preserve and maintain the rig under the “pre-operations” phase of our contract, which was entered into in August 2009 and expired on July 1, 2011. A new consulting services agreement was reached between the Company and BP effective July 1, 2011. Under the consulting services agreement, we assisted BP in a review of the rig’s design, the creation of a new statement of requirements for the rig, and the transition of documentation and materials to BP. All work under the consulting agreement has been completed and we are engaged with BP on construction contract close-out resolution. In June 2012, BP publicly announced that it had made the decision to suspend the Liberty project indefinitely. We do not know whether or how that decision may impact our discussions with BP related to contract close-out.
	Fair value measurements — For purposes of recording fair value adjustments for certain financial and non-financial assets and liabilities, and determining fair value disclosures, we estimate fair value at a price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants in the principal market for the asset or liability. Our valuation technique requires inputs that we categorize using a three-level hierarchy, from highest to lowest level of observable inputs, as follows: (1) unadjusted quoted prices for identical assets or liabilities in active markets (Level 1), (2) direct or indirect observable inputs, including quoted prices or other market data, for similar assets or liabilities in active markets or identical assets or liabilities in less active markets (Level 2) and (3) unobservable inputs that require significant judgment for which there is little or no market data (Level 3). When multiple input levels are required for a valuation, we categorize the entire fair value measurement according to the lowest level of input that is significant to the measurement even though we may have also utilized significant inputs that are more readily observable.
	Derivative Financial Instruments — We use derivative instruments to manage risks associated with interest rate fluctuations in connection with our Credit Agreement (see Note 7). These derivative instruments, which consist of variable-to-fixed interest rate swaps, are not designated as hedges. Accordingly, the change in the fair value of the interest rate swaps is recognized in earnings at each reporting period.
	Stock-Based Compensation — Under our long term incentive plans, we grant restricted stock awards (RSA), restricted stock units (RSU) and performance units (PU). For service-based awards and performance-based awards with graded vesting conditions, we recognize compensation expense on a straight-line basis over the service period for each separately vesting portion of the award as if the award was, in substance, multiple awards. For market-based awards that vest at the end of the service period, we recognize compensation expense on a straight-line basis through the end of the service period. Share-based awards generally vest over three years.
	Share-based compensation expense is recognized, net of an estimated forfeiture rate, which is based on historical experience and adjusted, if necessary, in subsequent periods based on actual forfeitures. The fair value of nonvested RSA’s and RSU’s is determined based on the closing trading price of the company’s shares on the grant date. Our RSA’s and RSU’s are settled in stock upon vesting. Our PU awards can be settled in cash or stock at the discretion of the compensation committee of the board of directors and are, therefore, accounted for as liability awards under the stock compensation rules of U.S. GAAP.
	We recognize share-based compensation expense in the same financial statement line item as cash compensation paid to the respective employees. Tax deduction benefits for awards in excess of recognized compensation costs are reported as a financing cash flow.

Asset_Impairment

Asset Impairment	12 Months Ended
Asset Impairment	Dec. 31, 2012
Asset Impairment	'
	Note 2 — Asset Impairment
	During the fourth quarter of 2011, we evaluated the present value of the future cash flows related to our AADU rigs in accordance with the impairment or disposal of long-lived assets subsections of ASC 360-10, Property, Plant and Equipment. The evaluation was performed as a result of the delay in completion of the rigs to allow the Company to modify the rigs to meet their design and functional requirements and an increase in the cost of the rigs. The need for the modifications was determined as a result of comprehensive safety, technical and operational reviews during commissioning activities of these prototype drilling rigs. The modification work extended the commissioning activities and increased the rigs’ total costs. At the time of the impairment evaluation, the two rigs’ cost at completion was estimated to be $385 million, which included capitalized interest estimates of approximately $50.7 million. This cost exceeded the estimated fair value of the rigs based on their projected cash flows. Based on this evaluation, the Company determined that the long-lived assets with a carrying amount of $339.5 million as of December 31, 2011, were no longer recoverable and were in fact impaired and recorded a charge in the 2011 fourth quarter of $170.0 million ($109.1 million, net of taxes) to reflect their estimated fair value of $169.5 million. Fair value was based on expected future cash flows using Level 3 inputs under the fair value measurement requirements. The cash flows are those expected to be generated by the market participants, discounted at the 10 percent rate of interest. In December 2012 we commenced drilling operations with the first AADU rig. The second rig completed client acceptance testing and began drilling in February 2013. The AADU rigs are reported as part of the U.S. Drilling segment.

Disposition_of_Assets

Disposition of Assets	12 Months Ended
Disposition of Assets	Dec. 31, 2012
Disposition of Assets	'
	Note 3 — Disposition of Assets
	Disposition of Assets — In December 2012, we sold a 33 year old posted barge drilling rig for proceeds of $0.2 million, resulting in a $0.5 million loss. There were no individually significant asset dispositions in 2011 and 2010.
	Provision for Reduction in Carrying Value of an Asset — In 2011 and 2010, we recognized a charge of $1.4 million, and $2.0 million respectively related to a final settlement of a bankruptcy proceeding. The 2010 reduction resulted from the conclusion that the Company’s rights to mineral reserves no longer supported the outstanding receivable. In 2011, the Company and the bankruptcy trustee settled claims through this final settlement. In 2012, we did not incur any provision for reduction in carrying value of an asset.

Assets_Held_for_Sale

Assets Held for Sale	9 Months Ended		12 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Assets Held for Sale	'		'
	6	Assets Held for Sale	Note 4 — Assets Held for Sale
	Assets held for sale of $7.5 million as of September 30, 2013 is comprised of the net book value of two land rigs and related inventory located in Kazakhstan, one barge rig and related inventory located in Mexico, and a building located in Tulsa, OK. Subsequent to placing the barge rig and inventory located in Mexico into assets held for sale, management determined that the carrying value of the assets would not be recovered through the sale of the assets. Therefore, during the third quarter of 2013 we recorded a non-cash charge of $0.9 million to write-down the value of the assets to estimated scrap value. The barge rig was in the Latin America rig fleet and has historically been included in the international drilling segment. We believe the carrying amount of the assets held for sale as of September 30, 2013 will be recoverable through sale of the assets. On October 8, 2013 we completed the sale of the building located in Tulsa, OK. As a result of the completed sale, during the 2013 third quarter, we reversed a reserve previously recorded against the carrying value of the asset. We will recognize a gain of $0.1 million on the transaction during the 2013 fourth quarter.		Assets held for sale of $11.6 million as of December 31, 2012 was comprised of the net book value of five land rigs and related inventory. For three rigs comprising $5.3 million of the assets held for sale balance, we have received $1.6 million in down payment and deposits on these assets and associated inventories. The sale of these assets is expected to be finalized in 2013. Prior to being classified as assets held for sale, these assets were included in the International Drilling segment. We expect the carrying amount of the assets, less costs to sell, will be fully recoverable through sale of the assets.
	During the 2013 second quarter, for three rigs which had previously been recorded as assets held for sale as of December 31, 2010, management concluded the current facts and circumstances underlying the sale indicate it is no longer probable that a sale will be consummated within a reasonable time period. As a result, we reclassified these assets to assets held and used. The assets were reclassified at their carrying amount before the assets were classified as held for sale, adjusted for depreciation expense that would have been recognized had the assets been continuously classified as held and used. We believe the updated carrying value approximates the market value for these assets. The amount of additional depreciation recorded during the quarter ended June 30, 2013 to place the assets in held and used category was $0.7 million.		Additionally, during the third quarter of 2012, we determined that two of our rigs located in Kazakhstan met the criteria for classification as assets held for sale. As of September 30, 2012, we reclassified the $6.4 million net book value of these assets and associated inventories to assets held for sale. Prior to being classified as assets held for sale, these assets were included in the International Drilling segment. We expect the carrying amount of the assets, less costs to sell, will be fully recoverable through sale of the assets.

Income_Tax_BenefitExpense

Income Tax Benefit/Expense	9 Months Ended		12 Months Ended
Income Tax Benefit/Expense	Sep. 30, 2013		Dec. 31, 2012
Income Tax Benefit/Expense	'		'
	8	Income Tax Benefit/Expense	Note 5 — Income Taxes
	Income tax expense was $9.1 million for the third quarter of 2013 as compared to $6.7 million for the third quarter of 2012. The increase in current period income tax expense is primarily due to a shift in the mix of our foreign and domestic operation’s pre-tax earnings for the 2013 third quarter compared to the 2012 third quarter. This shift resulted in an increase in our estimated effective tax rate during the 2013 third quarter.		Income (loss) before income taxes is summarized below:
	During the nine months ended September 30, 2013, we received income tax refunds from the IRS of $22.4 million. In addition to the refund payments, we received interest of $2.2 million, which was recorded in the consolidated condensed statement of operations as interest income.
					Year Ended December 31,
					2012				2011			2010
					(Dollars in Thousands)
			United States		$	52,422			$	(61,434	)	$	1,865
			Foreign			18,555				(3,978	)		9,640

					$	70,977			$	(65,412	)	$	11,505

			Income tax expense (benefit) is summarized as follows:

					Year Ended December 31,
					2012				2011			2010
					(Dollars in Thousands)
			Current:
			United States:
			Federal		$	7,791			$	17,168		$	(273	)
			State			733				1,264			184
			Foreign			9,518				15,176			27,610
			Deferred:
			United States:
			Federal			15,612				(46,694	)		(3,981	)
			State			4,296				1,864			1,459
			Foreign			(4,071	)			(3,545	)		1,214

					$	33,879			$	(14,767	)	$	26,213

			Total income tax expense differs from the amount computed by multiplying income before income taxes by the U.S. federal income tax statutory rate. The reasons for this difference are as follows:

					Year Ended December 31,
					2012							2011						2010
					(Dollars in Thousands)
					Amount				% of Pre-Tax			Amount			% of Pre-Tax			Amount			% of Pre-Tax
					Amount				Income			Amount			Income			Amount			Income
			Computed Expected Tax Expense		$	24,842				35	%	$	(22,894	)		35	%	$	4,027			35	%
			Foreign Taxes			13,428				19	%		15,644			-24	%		18,951			165	%
			Tax Effect Different From Statutory Rates			(8,080	)			-11	%		(1,571	)		2	%		(7,996	)		-70	%
			State Taxes, net of federal benefit			4,757				7	%		2,689			-4	%		1,579			14	%
			Foreign Tax Credits			(1,867	)			-3	%		(14,595	)		22	%		(15,442	)		-134	%
			Kazakhstan Tax Settlement			—				0	%		(536	)		1	%		13,304			116	%
			Mexico Tax Settlement			—				0	%		—			0	%		1,022			9	%
			Change in Valuation Allowance			(1,662	)			-2	%		2,542			-4	%		506			4	%
			Uncertain Tax Positions			(6,814	)			-10	%		1,348			-2	%		983			9	%
			Permanent Differences			5,477				8	%		6,356			-10	%		6,003			52	%
			Prior Year Return to Provision Adjustments			2,948				4	%		835			-1	%		1,775			15	%
			Other			850				1	%		899			-1	%		1,501			13	%
			Unremitted Foreign Earnings-Current Year Adjustment			—				0	%		(5,484	)		8	%		—			0	%

			Actual Tax Expense		$	33,879				48	%	$	(14,767	)		22	%	$	26,213			228	%

			The components of the Company’s deferred tax assets and liabilities as of December 31, 2012 and 2011 are shown below:

					December 31,
					2012				2011
					(Dollars in Thousands)
			Deferred tax assets
			Current deferred tax assets:
			Reserves established against realization of certain assets		$	1,634			$	3,284
			Accruals			6,747				3,065
			Other			361				301

		Gross current deferred tax assets			8,742				6,650
		Valuation allowance			—				—

		Current deferred tax assets			8,742				6,650

		Non-current deferred tax assets:
		Federal net operating loss carryforwards			—				361
		State net operating loss carryforwards			3,095				6,393
		Other state deferred tax asset, net			914				656
		Foreign Tax Credits			25,977				28,146
		Note Hedge Interest			—				1,318
		Uncertain tax positions			8,015				8,188
		Foreign tax			5,838				9,824
		Impairment of long-lived assets			56,190				59,500
		Other			71				392

		Gross long-term deferred tax assets			100,100				114,778
		Valuation Allowance			(4,805	)			(6,467	)

		Non-current deferred tax assets, net of valuation allowance			95,295				108,311

		Net deferred tax assets			104,037				114,961

		Deferred tax liabilities:
		Non-current deferred tax liabilities:
		Property, Plant and equipment			(19,139	)			(8,986	)
		Accruals			(1,066	)			—
		Foreign tax			—				(6,379	)
		Convertible Debt			—				(31	)
		Deferred compensation			2,001				1,243
		Other state deferred tax liability, net			(2,643	)
		Other			—				(630	)

		Gross non-current deferred tax liabilities			(20,847	)			(15,934	)

		Net deferred tax asset		$	83,190			$	99,027

		As part of the process of preparing the consolidated financial statements, the Company is required to determine its provision for income taxes. This process involves estimating the annual effective tax rate and the nature and measurements of temporary and permanent differences resulting from differing treatment of items for tax and accounting purposes. These differences and the operating loss and tax credit carryforwards result in deferred tax assets and liabilities. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that all or a portion of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income of appropriate character in each taxing jurisdiction during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities (including the impact of available carryback and carryforward periods), projected future taxable income, and tax planning strategies in making this assessment. To the extent the Company believes that it does not meet the test that recovery is more likely than not, it establishes a valuation allowance. To the extent that the Company establishes a valuation allowance or changes this allowance in a period, it adjusts the tax provision or tax benefit in the consolidated statement of operations. We use our judgment in determining provisions or benefits for income taxes, and any valuation allowance recorded against previously established deferred tax assets. Based upon the factors considered by management in assessing the realizability of the deferred tax assets, management believes it is more likely than not that the Company will realize the benefits of these deductible differences, net of the existing valuation allowances at December 31, 2012. The amount of the deferred tax asset considered realizable, however, could be reduced in the near term if estimates of future taxable income during the carryforward period are reduced.
		The 2012 results include income tax expenses of $1.7 million related to the effective settlement of our US Federal Internal Revenue Service examination for the 2006 through 2010 periods and $7.7 million for depreciation and amortization relating to our AADU rigs in Alaska. In addition, we decreased our valuation allowance by $1.7 million primarily related to foreign NOLs.
		The 2011 results include an income tax benefit of $60.9 million (federal and state combined) related to the $170.0 million non-cash pretax impairment charge relating to our AADU rigs in Alaska. In addition, we increased our valuation allowance by $2.5 million primarily related to foreign NOL’s.
		The 2010 results include income tax expense primarily related to an unfavorable ruling by the Atyrau Oblast Court. The Kazakhstan tax matter increased tax expense by approximately $14.5 million ($6.8 million net of anticipated tax benefits), which includes approximately $6.5 million in tax, $4.8 million in interest and $3.2 million in penalties. PKD Kazakhstan intends to submit a further discretionary appeal to the Supreme Court of the Republic of Kazakhstan. In addition, tax expense increased from our settlement of a foreign tax audit for one of our subsidiaries for $1.2 million, which includes approximately $0.6 million of tax, $0.1 million in interest, and $0.5 million in penalties.
		A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

				In Thousands
		Balance at January 1, 2012		$	(15,492	)
		Additions based on tax positions taken during a prior period			(1,495	)
		Reductions based on tax positions taken during a prior period			4,102
		Reductions related to a lapse of applicable statute of limitations			2,855

		Balance at December 31, 2012		$	(10,030	)

		In many cases, our uncertain tax positions are related to tax years that remain subject to examination by tax authorities. The following describes the open tax years, by major tax jurisdiction, as of December 31, 2012:

		Colombia		2008-present
		Kazakhstan		2007-present
		Mexico		2007-present
		Papua New Guinea		2010-present
		Russia		2009-present
		United States — Federal		2011-present
		At December 31, 2012, we had a liability for unrecognized tax benefits of $10.0 million ($3.2 million of which, if recognized, would favorably impact our effective tax rate).
		The Company recognized interest and penalties related to uncertain tax positions in income tax expense. As of December 31, 2012 and December 31, 2011 we had approximately $7.0 million and $8.4 million of accrued interest and penalties related to uncertain tax positions, respectively. We recognized a decrease of $0.2 million of interest and a decrease of $1.1 million of penalties on unrecognized tax benefits for the year ended December 31, 2012.
		As of December 31, 2012, the Company has permanently reinvested accumulated undistributed earnings of foreign subsidiaries and, therefore, has not recorded a deferred tax liability related to subject earnings. Upon distribution of additional earnings in the form of dividends or otherwise, we would likely be subject to US income taxes and foreign withholding taxes. It is not practicable to determine precisely the amount of taxes that may be payable on the eventual remittance of these earnings because of the application of US foreign tax credits. While we currently claim foreign tax credits, we may not be in a credit position if and when future remittances of foreign earnings occur, or the limitation imposed by the Internal Revenue Code and regulations thereunder may not allow the credits to be utilized during the applicable carryback and carryforward periods.

LongTerm_Debt

Long-Term Debt

9 Months Ended

12 Months Ended

Sep. 30, 2013

Dec. 31, 2012

Long-Term Debt

Note 6 — Long-Term Debt

The following table illustrates our debt portfolio as of September 30, 2013 and December 31, 2012:

The following table illustrates the Company’s current debt portfolio as of December 31, 2012 and December 31, 2011:

September 30,

December 31,

2013

2012

2011

(Dollars in Thousands)

7.50% Senior Notes, due August 2020

225,000

—

Senior Notes — payable in April 2018; fixed interest at 9.125% payable semi-annually in April and October (Issued March 22, 2010).

300,000

9.125% Senior Notes, due April 2018

428,968

429,205

Senior Notes — payable in April 2018; fixed interest at 9.125% payable semi-annually in April and October (Issued April 25, 2012).

129,205

—

Term Note, due December 2017

—

50,000

$125.0 million aggregate principal Convertible Senior Notes — payable in July 2012; interest at 2.125% payable semi-annually in January and July, net of unamortized discount of $3,277 at December 31, 2011.

—

121,723

Term Note — amortizes $2.5 million per quarter beginning March 31, 2013 ($6.0 million per quarter prior to March 31, 2013); interest at prime, plus an applicable margin or LIBOR, plus an applicable margin. (Effective interest rate of 3.21% and 3.55% at December 31, 2012 and December 31, 2011, respectively)

50,000

61,000

Total debt

653,968

479,205

Total debt

479,205

482,723

Less current portion

—

10,000

Less current portion

10,000

145,723

Total long-term debt

469,205

337,000

Total long-term debt

653,968

469,205

The aggregate maturities of long-term debt, including unamortized premiums of $4.2 million, as of December 31, 2012 are as follows:

7.50% Senior Notes, due August 2020

On July 30, 2013, we issued $225.0 million aggregate principal amount of 7.50% Senior Notes (7.50% Notes) pursuant to an Indenture between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee. Net proceeds from the 7.50% Notes offering were primarily used to repay the $125.0 million aggregate principal amount of the Goldman Term Loan, to repay $45.0 million of Term Loan borrowings under our Credit Agreement and for general corporate purposes.

•

2013 — $11.0 million

The 7.50% Notes are general unsecured obligations of the Company and rank equal in right of payment with all of our existing and future senior unsecured indebtedness. The 7.50% Notes are jointly and severally guaranteed by all of our subsidiaries that guarantee indebtedness under our senior secured credit facility. Interest on the 7.50% Notes is payable on February 1 and August 1 of each year, beginning February 1, 2014. Debt issuance costs related to the 7.50% Notes were $5.3 million ( $5.2 million, net of amortization as of September 30, 2013) and will be amortized over the term of the notes using the effective interest rate method.

At any time prior to August 1, 2016, we may redeem up to 35 percent of the aggregate principal amount of the 7.50% Notes at a redemption price of 107.50 percent of the principal amount, plus accrued and unpaid interest to the redemption date, with the net cash proceeds of certain equity offerings by us. On and after August 1, 2016, we may redeem all or a part of the 7.50% Notes upon appropriate notice, at a redemption price of 103.750 percent of the principal amount, and at redemption prices decreasing each year thereafter to par beginning August 1, 2018. If we experience certain changes in control, we must offer to repurchase the 7.50% Notes at 101.0 percent of the aggregate principal amount, plus accrued and unpaid interest and additional interest, if any, to the date of repurchase.

•

2014 — $10.9 million

The Indenture restricts our ability and the ability of certain subsidiaries to: (i) sell assets, (ii) pay dividends or make other distributions on capital stock or redeem or repurchase capital stock or subordinated indebtedness, (iii) make investments, (iv) incur or guarantee additional indebtedness; (v) create or incur liens; (vi) enter into sale and leaseback transactions; (vii) incur dividend or other payment restrictions affecting subsidiaries, (viii) merge or consolidate with other entities, (ix) enter into transactions with affiliates, and (x) engage in certain business activities. Additionally, the Indenture contains certain restrictive covenants designating certain events as Events of Default. These covenants are subject to a number of important exceptions and qualifications.

9.125% Senior Notes, due April 2018

•

2015 — $10.8 million

On March 22, 2010, we issued $300.0 million aggregate principal amount of 9.125% Senior Notes (9.125% Notes) pursuant to an Indenture between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee. Net proceeds from the 9.125% Notes offering were primarily used to redeem the $225.0 million aggregate principal amount of our 9.625% Senior Notes due 2013 and to repay $42.0 million of borrowings under our senior secured revolving credit facility (Revolver).

•

2016 — $10.7 million

On April 25, 2012, we issued an additional $125.0 million aggregate principal amount of 9.125% Notes under the same indenture at a price of 104.0% of par, resulting in gross proceeds of $130.0 million. Net proceeds from the offering were utilized to refinance $125.0 million aggregate principal amount of the 2.125% Convertible Senior Notes due July 2012 (2.125% Notes). The premium related to the $125.0 million of 9.125% Notes of approximately $5.0 million ($4.0 million, net of amortization as of September 30, 2013) is being amortized over the term of the notes using the effective interest rate method. We repurchased $122.9 million aggregate principal amount of the 2.125% Notes tendered pursuant to a tender offer on May 9, 2012 and paid off the remaining $2.1 million at their stated maturity on July 15, 2012.

The 9.125% Notes are general unsecured obligations of the Company and rank equal in right of payment with all of our existing and future senior unsecured indebtedness. The 9.125% Notes are jointly and severally guaranteed by substantially all of our subsidiaries that guarantee indebtedness under our senior secured credit facility. Interest on the 9.125% Notes is payable on April 1 and October 1 of each year. Debt issuance costs related to the 9.125% Notes of approximately $11.6 million ( $8.1 million, net of amortization as of September 30, 2013 ) are being amortized over the term of the notes using the effective interest rate method.

•

2017 and thereafter — $435.8 million

At any time after April 1, 2014, we may redeem all or a part of the 9.125% Notes upon appropriate notice, at a redemption price of 104.563 percent of the principal amount, and at redemption prices decreasing each year thereafter to par beginning April 1, 2016. If we experience certain changes in control, we must offer to repurchase the 9.125% Notes at 101.0 percent of the aggregate principal amount, plus accrued and unpaid interest and additional interest, if any, to the date of repurchase.

9.125% Senior Notes, due April 2018

Goldman Term Loan

On April 25, 2012, we issued an additional $125.0 million aggregate principal amount of 9.125% Notes under the same indenture at a price of 104.0% of par, resulting in gross proceeds of $130.0 million. Net proceeds from the offering were utilized to refinance $125.0 million aggregate principal amount of the 2.125% Convertible Senior Notes due July 2012 (2.125% Notes). We repurchased $122.9 million aggregate principal amount of the 2.125% Notes tendered pursuant to a tender offer on May 9, 2012 and paid off the remaining $2.1 million at their stated maturity on July 15, 2012.

In connection with the ITS Acquisition described in Note 2 on April 18, 2013, we entered into a $125 million term loan, fully funded by Goldman Sachs Bank USA as Sole Lead Arranger and Administrative Agent (the Goldman Term Loan). The Goldman Term Loan was repaid on July 30, 2013 with net proceeds from the issuance of $225.0 million aggregate principal amount of 7.50% Senior Notes due August 1, 2020. In connection with the repayment of the Goldman Term Loan we incurred debt extinguishment costs of $5.2 million.

The 9.125% Notes are general unsecured obligations of the Company and rank equal in right of payment with all of our existing and future senior unsecured indebtedness. The 9.125% Notes are jointly and severally guaranteed by substantially all of our direct and indirect subsidiaries other than immaterial subsidiaries and subsidiaries generating revenues primarily outside the United States. Interest on the 9.125% Notes is payable on April 1 and October 1 of each year. Debt issuance costs related to the 9.125% Notes of approximately $11.6 million ($7.6 million, net of amortization) are being amortized over the term of the notes using the effective interest rate method.

Amended and Restated Credit Agreement

At any time prior to April 1, 2013, we may redeem up to 35 percent of the aggregate principal amount of the 9.125% Notes at a redemption price of 109.125 percent of the principal amount, plus accrued and unpaid interest to the redemption date, with the net cash proceeds of certain equity offerings by us. On and after April 1, 2014, we may redeem all or a part of the 9.125% Notes upon appropriate notice, at a redemption price of 104.563 percent of the principal amount, and beginning April 1, 2016 at redemption prices decreasing each year thereafter to par. If we experience certain changes in control, we must offer to repurchase the 9.125% Notes at 101.0 percent of the aggregate principal amount, plus accrued and unpaid interest and additional interest, if any, to the date of repurchase.

On December 14, 2012, we entered into an Amended and Restated Credit Agreement (Credit Agreement) consisting of a senior secured $80.0 million revolving facility (Revolver) and a senior secured term loan facility (Term Loan) of $50.0 million. The Credit Agreement provides that, subject to certain conditions, including the approval of the Administrative Agent and the lenders’ acceptance (or additional lenders being joined as new lenders), the amount of the Term Loan or Revolver can be increased by an additional $50.0 million, so long as after giving effect to such increase, the aggregate commitments are not in excess of $180.0 million.

Our loans pursuant to the Credit Agreement, the 9.125% Notes, and the 7.50% Notes are guaranteed by substantially all of our direct and indirect domestic subsidiaries other than immaterial subsidiaries and subsidiaries generating revenues primarily outside the United States, each of which have executed guaranty agreements; and are secured by first priority liens on our accounts receivable, specified barge rigs and rental equipment. The Credit Agreement contains customary affirmative and negative covenants with which we were in compliance as of September 30, 2013 and December 31, 2012. The Credit Agreement matures on December 14, 2017.

2.125% Convertible Senior Notes, due July 2012

On July 19, 2013, we entered into an amendment to our Credit Agreement which, among other things, permits us or any of our subsidiaries (other than certain immaterial subsidiaries) to incur indebtedness pursuant to additional unsecured senior notes in an aggregate principal amount not to exceed $250.0 million at any one time outstanding; provided that any such notes shall (x) have a scheduled maturity occurring after the maturity date of our senior secured credit facility, (y) contain terms (including covenants and events of default) no more restrictive, taken as a whole, to us and our subsidiaries than those contained in our senior secured credit facility and (z) have no scheduled amortization, no sinking fund requirements and no maintenance financial covenants. In addition, pursuant to the amendment, and subject to the terms and conditions set forth in the Credit Agreement, to the extent we repay the principal amount of Term Loans outstanding under our senior secured credit facility, until April 30, 2014 we may reborrow, in the form of additional term loans, up to $45 million of the principal amount of such outstanding term loans we have repaid, provided that such $45 million reborrowing amount will decrease by $2.5 million at the end of each quarter beginning September 30, 2013 and ending March 31, 2014, such that the reborrowing availability on September 30, 2013 would be $42.5 million and on April 30, 2014 would be $37.5 million.

On July 5, 2007, we issued $125.0 million aggregate principal amount of 2.125% Notes. As noted above, on May 9, 2012, we repurchased $122.9 million aggregate principal amount of the 2.125% Notes pursuant to a tender offer. The tender offer price was $1,003.27 for each $1,000 principal amount of 2.125% Notes, plus accrued and unpaid interest. This repurchase resulted in the recording of debt extinguishment costs of $1.8 million related to the accelerated amortization of both the unamortized debt issuance costs and debt discount associated with the 2.125% Notes. The remaining $2.1 million aggregate principal amount of non-tendered 2.125% Notes was subsequently paid off at their stated maturity on July 15, 2012.

Revolver

Concurrently with the issuance of the 2.125% Notes, we purchased a convertible note hedge (note hedge) and sold warrants in private transactions with counterparties that were different than the ultimate holders of the 2.125% Notes. The note hedge allowed us to receive shares of our common stock from the counterparties to the transaction equal to the amount of common stock related to the excess conversion value that we would issue and/or pay to the holders of the 2.125% Notes upon conversion. The warrants allowed us to sell 9,027,713 common shares at a strike price of $18.29 per share. The note hedge expired on July 15, 2012, the maturity date of the 2.125% Notes. The warrants expired ratably from October 15, 2012 to February 22, 2013.

Our Revolver is available for general corporate purposes and to support letters of credit. Interest on Revolver loans accrues at a Base Rate plus an Applicable Rate or LIBOR plus an Applicable Rate. Under the Credit Agreement, the Applicable Rate varies from a rate per annum ranging from 2.50 percent to 3.00 percent for LIBOR rate loans and 1.50 percent to 2.00 percent for base rate loans, determined by reference to the consolidated leverage ratio (as defined in the Credit Agreement). Revolving loans are available subject to a borrowing base calculation based on a percentage of eligible accounts receivable, certain specified barge drilling rigs and rental equipment of the Company and its subsidiary guarantors. There were no revolving loans outstanding at September 30, 2013 and December 31, 2012. Letters of credit outstanding against the Revolver as of September 30, 2013 and December 31, 2012 totaled $3.8 million and $4.5 million, respectively.

Term Loan

Because we had the choice of settling the call options and the warrants in cash or shares of our common stock and these contracts met all of the applicable criteria for equity classification, the cost of the call options and proceeds from the sale of the warrants were classified in stockholders’ equity in the consolidated condensed balance sheets. In addition, because both of these contracts are classified in stockholders’ equity and were indexed solely to our common stock, they were not accounted for as derivatives.

The Term Loan originated at $50.0 million on December 14, 2012 and required quarterly principal payments of $2.5 million, which began March 31, 2013. Interest on the Term Loan accrues at a Base Rate plus 2.00 percent or LIBOR plus 3.00 percent. The outstanding balance on the Term Loan at September 30, 2013 and December 31, 2012 was zero and $50.0 million, respectively.

Debt issuance costs related to the 2.125% Notes of approximately $3.6 million were amortized over the five year term of the 2.125% Notes using the effective interest method.

Amended and Restated Credit Agreement

On December 14, 2012, we entered into an Amended and Restated Credit Agreement (Credit Agreement) consisting of a senior secured $80.0 million Revolver and senior secured term loan facility (Term Loan) of $50.0 million. The Credit Agreement amended and restated our existing credit agreement dated May 15, 2008 (Existing Credit Agreement). We entered into the Credit Agreement to extend its maturity from May 14, 2013 to December 14, 2017 and to decrease the range of Applicable Rates under our Revolver. The Credit Agreement provides that, subject to certain conditions, including the approval of the Administrative Agent and the lenders’ acceptance (or additional lenders being joined as new lenders), the amount of the Term Loan or Revolver can be increased by an additional $50.0 million, so long as after giving effect to such increase, the Aggregate Commitments shall not be in excess of $180.0 million.

Our obligations under the Credit Agreement are guaranteed by substantially all of our domestic subsidiaries, each of which has executed guaranty agreements; and are secured by first priority liens on our accounts receivable, specified barge rigs and rental equipment. The Credit Agreement contains customary affirmative and negative covenants with which we were in compliance as of December 31, 2012 and December 31, 2011. The Credit Agreement terminates on December 14, 2017.

Revolver

Our Revolver is available for general corporate purposes and to support letters of credit. Interest on Revolver loans accrues at a Base Rate plus an Applicable Rate or LIBOR plus an Applicable Rate. Under the Credit Agreement, the Applicable Rate varies from a rate per annum ranging from 2.50 percent to 3.00 percent for LIBOR rate loans and 1.50 percent to 2.00 percent for base rate loans, determined by reference to the consolidated leverage ratio (as defined in the Credit Agreement). Under the Existing Credit Agreement, the Applicable Rate varied from a rate per annum ranging from 2.75 percent to 3.25 percent for LIBOR rate loans and 1.75 percent to 2.25 percent for base rate loans. Revolving loans are available subject to a borrowing base calculation based on a percentage of eligible accounts receivable, certain specified barge drilling rigs and rental equipment of the Company and its subsidiary guarantors. There were no revolving loans outstanding at December 31, 2012 and December 31, 2011. Letters of credit outstanding as of December 31, 2012 and December 31, 2011 totaled $4.5 million and $2.7 million, respectively.

Term Loan

The Term Loan originated at $50.0 million on December 14, 2012 and requires quarterly principal payments of $2.5 million beginning March 31, 2013. Interest on the Term Loan accrues at a Base Rate plus 2.00 percent or LIBOR plus 3.00 percent. The Existing Credit Agreement required quarterly principal payments of $6.0 million, and interest accrued at a Base Rate plus 2.25 percent or LIBOR plus 3.25 percent. The outstanding balance on the Term Loans at December 31, 2012 was $50.0 million under the Credit Agreement. The outstanding balance under the then existing Credit Agreement as of December 31, 2011 was $61.0 million.

Derivative_Financial_Instrumen

Derivative Financial Instruments	9 Months Ended		12 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Derivative Financial Instruments	'		'
	10	Derivative Financial Instruments	Note 7 — Derivative Financial Instruments
	The Company entered into two variable-to-fixed interest rate swap agreements as a strategy to manage the floating rate risk on the Term Loan borrowings under the Credit Agreement. The two agreements fixed the interest rate on a notional amount of $73.0 million of borrowings at 3.878% for the period beginning June 27, 2011 and terminating May 14, 2013. The notional amount of the swap agreements decreased correspondingly with amortization of the Term Loan under the Existing Credit Agreement. We did not apply hedge accounting to the agreements and, accordingly, mark-to-market change in the fair value of the interest rate swaps were recognized in earnings. As of December 31, 2012, the fair value of the interest rate swap was a liability of less than $0.1 million and was recorded in accrued liabilities in our consolidated balance sheets. There was no impact to the quarter ended September 30, 2013, as the swap agreement expired during the 2013 second quarter.		The Company entered into two variable-to-fixed interest rate swap agreements as a strategy to manage the floating rate risk on the Term Loan borrowings under the Credit Agreement. The two agreements fix the interest rate on a notional amount of $73.0 million of borrowings at 3.878% for the period beginning June 27, 2011 and terminating May 14, 2013. The notional amount of the swap agreements decrease correspondingly with amortization of the Term Loan. We will not apply hedge accounting to the agreements and, accordingly, mark-to-market change in the fair value of the interest rate swaps are recognized in earnings. As of December 31, 2012, the fair value of the interest rate swap was a liability of $0.1 million and is recorded in accrued liabilities in our consolidated balance sheets. For the year ended December 31, 2012, the Company recognized in earnings a $0.1 million loss relating to these contracts.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	9 Months Ended										12 Months Ended
Fair Value of Financial Instruments	Sep. 30, 2013										Dec. 31, 2012
Fair Value of Financial Instruments	'										'
	11	Fair Value of Financial Instruments									Note 8 — Fair Value of Financial Instruments
	Certain of our assets and liabilities are required to be measured at fair value on a recurring basis. For purposes of recording fair value adjustments for certain financial and non-financial assets and liabilities, and determining fair value disclosures, we estimate fair value at a price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants in the principal market for the asset or liability.										Certain of our assets and liabilities are required to be measured at fair value on a recurring basis. For purposes of recording fair value adjustments for certain financial and non-financial assets and liabilities, and determining fair value disclosures, we estimate fair value at a price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants in the principal market for the asset or liability.
	The fair value measurement and disclosure requirements of FASB Accounting Standards Codification Topic No. 820, Fair Value Measurement and Disclosures (ASC 820) requires inputs that we categorize using a three-level hierarchy, from highest to lowest level of observable inputs, as follows:										The fair value measurement and disclosure requirements of FASB Accounting Standards Codification Topic No. 820, Fair Value Measurement and Disclosures (ASC 820) requires inputs that we categorize using a three-level hierarchy, from highest to lowest level of observable inputs, as follows:
											Level 1 — Unadjusted quoted prices for identical assets or liabilities in active markets
		•		Level 1 — Unadjusted quoted prices for identical assets or liabilities in active markets;							Level 2 — Direct or indirect observable inputs, including quoted prices or other market data, for similar assets or liabilities inactive markets or identical assets or liabilities in less active markets and
											Level 3 — Unobservable inputs that require significant judgment for which there is little or no market data.
		•		Level 2 — Direct or indirect observable inputs, including quoted prices or other market data, for similar assets or liabilities in active markets or identical assets or liabilities in less active markets;							When multiple input levels are required for a valuation, we categorize the entire fair value measurement according to the lowest level of input that is significant to the measurement even though we may have also utilized significant inputs that are more readily observable. The amounts reported in our consolidated balance sheets for cash and cash equivalents, accounts receivable, and accounts payable approximate fair value. The carrying amount of our interest rate swap agreements represents the estimated fair value, measured using Level 2 inputs. At each year ended December 31, 2012 and 2011, the carrying amount of our interest rate swap agreements was a liability of $0.1 million, recorded in accrued liabilities and other long-term liabilities, respectively on our consolidated balance sheets.
											Fair value of our debt instruments is determined using Level 2 inputs. Fair values and related carrying values of our debt instruments are as follows:
		•		Level 3 — Unobservable inputs that require significant judgment for which there is little or no market data.
	When multiple input levels are required for a valuation, we categorize the entire fair value measurement according to the lowest level of input that is significant to the entire measurement even though we may also have utilized significant inputs that are more readily observable. The amounts reported in our consolidated balance sheets for cash and cash equivalents, accounts receivable, and accounts payable approximate fair value. The carrying amount of our interest rate swap agreements represents the estimated fair value, measured using Level 2 inputs. As of June 30, 2013 the swap agreements had expired and as of December 31, 2012, the carrying amount of our interest rate swap agreements was a liability of less than $0.1 million, recorded in accrued liabilities on our consolidated balance sheets.
	Fair value of our debt instruments is determined using Level 2 inputs. Fair values and related carrying values of our debt instruments were as follows for the periods indicated:											December 31, 2012				December 31, 2011
												Carrying Amount		Fair Value		Carrying Amount		Fair Value
												(in thousands)
			September 30, 2013				December 31, 2012				Long-term Debt
			Carrying		Fair Value		Carrying		Fair Value		9.125% Notes	$	300,000	$	320,250	$	300,000	$	315,000
			Amount		Fair Value		Amount		Fair Value		9.125% Notes	$	125,000	$	133,438
			(in thousands)								2.125% Notes		—		—		125,000		123,204
	Long-term Debt
	7.50% Notes		$	225,000	$	225,000	$	—	$	—	Total	$	425,000	$	453,688	$	425,000	$	438,204
	9.125% Notes			425,000		454,750		425,000		453,688
											As discussed in Note 2, in accordance with the impairment or disposal of long-lived assets subsections of ASC 360-10, Property, Plant and Equipment, during the fourth quarter of 2011, our AADU assets with a carrying value as of December 31, 2011 of $339.5 million were written down to their estimated fair value of $169.5 million, resulting in a pretax non-cash charge of $170.0 million which is included in earnings for the period. The fair value was based on expected future cash flows using Level 3 inputs.
	Total		$	650,000	$	679,750	$	425,000	$	453,688
											Market conditions could cause an instrument to be reclassified from Level 1 to Level 2, or Level 2 to Level 3. There were no transfers between levels of the fair value hierarchy or any changes in the valuation techniques used during the year ended December 31, 2012.
	The assets acquired and liabilities assumed in the ITS Acquisition were recorded at fair value in accordance with U.S. GAAP. Acquisition date fair values represent either Level 2 fair value measurements (current assets and liabilities, property, plant and equipment) or Level 3 fair value measurements (intangible assets).
	Market conditions could cause an instrument to be reclassified from Level 1 to Level 2, or Level 2 to Level 3. There were no transfers between levels of the fair value hierarchy or any changes in the valuation techniques used during the nine months ended September 30, 2013.

Common_Stock_and_Stockholders_

Common Stock and Stockholders' Equity	12 Months Ended
Common Stock and Stockholders' Equity	Dec. 31, 2012
Common Stock and Stockholders' Equity	'
	Note 9 — Common Stock and Stockholders’ Equity
	Stock Plans — The Company’s employee and non-employee director stock plans are summarized as follows:
	The 2010 Long-Term Incentive Plan (2010 Plan) was approved by the stockholders at the Annual Meeting of Stockholders on May 7, 2010. The 2010 Plan authorizes the compensation committee or the board of directors to issue stock options, stock appreciation rights, RSAs, RSUs, performance-based awards and other types of awards in cash or stock to key employees, consultants, and directors. The maximum number of shares of our common stock that may be delivered pursuant to the awards granted under the 2010 Plan is 5,800,000 shares of common stock.
	On September 17, 2012, Gary Rich was elected as President and Chief Executive Officer of the company. As part of his employment agreement, he was granted 349,651 restricted stock units, which were granted outside of the Company’s 2010 Plan but are subject to substantially the same terms and conditions of other service-based restricted stock units granted by the Company to its executive officers.
	The 2005 Long-Term Incentive Plan (2005 Plan) was approved by the stockholders at the Annual Meeting of Stockholders on April 27, 2005. The 2005 Plan authorizes the compensation committee or the board of directors to issue stock options, stock grants and various types of incentive awards in cash or stock to key employees, consultants and directors. During 2008, we obtained stockholder’s approval to increase the total number of common shares available for future awards under the 2005 Plan. This amendment to the 2005 Plan was approved by stockholders at our Annual Meeting on March 21, 2008. No further grants can be made under this plan.
	Information regarding the Company’s Long-Term Incentive plans is summarized below:


	Nonvested Shares	Shares			Weighted
					Average
					Grant-Date
					Fair Value
	Nonvested at January 1, 2012		2,813,409		$	6.91
	Granted		1,558,347			5.37
	Vested		(1,472,233	)		4.86
	Forfeited		(505,626	)		5.44

	Nonvested at December 31, 2012		2,393,897		$	5.22

	In 2012 and 2011, we issued 1,558,347 and 1,457,039, respectively, of restricted shares to selected key personnel. Total stock-based compensation expense recognized for the years ended December 31, 2012, 2011, and 2010 was $7.2 million, $5.9 million, and $5.5 million, respectively, all of which was related to nonvested stock. The total fair value of the shares vested during the years ended December 31, 2012, 2011, and 2010 was $7.2 million, $6.9 million, and $4.1 million, respectively. The fair value of RSA’s and RSU’s is determined based on the closing trading price of the company’s shares on the grant date. The weighted-average grant-date fair value of shares granted during the years 2012, 2011, and 2010 was $5.37, $5.61, and $4.54, respectively. Stock-based compensation expense is included in our consolidated statements of operations in both “General and administration expense” and “Operating expenses.”
	Nonvested RSAs and RSUs at December 31, 2012 totaled 2,393,897 shares and total unrecognized compensation cost related to unamortized nonvested stock awards was $6.8 million as of December 31, 2012. The remaining unrecognized compensation cost related to non-vested stock awards will be amortized over a weighted-average vesting period of approximately 20.1 months.

	During the year ended December 31, 2012, we granted to certain of our officers and key employees a total of 38,429 performance units under the 2010 Long Term Incentive Plan. Subsequent to the award of these performance units, 3,955 units were forfeited during 2012. During the year ended December 31, 2011, we granted to certain of our officers and key employees a total of 44,500 performance units under the 2010 Long Term Incentive Plan. Subsequent to the award of these performance units, 2,424 units were forfeited during 2011. Incentive grants included in this issuance were based on the attainment of pre-established performance goals. Each performance unit has a nominal value of $100.00. Awards are dependent upon our total stockholder return and return on capital employed relative to a peer group of companies over a three-year performance period. A maximum of 200 percent of the number of performance units granted may be earned if performance at the maximum level is achieved. Performance units can be settled in cash or stock at the discretion of the compensation committee of the board of directors and are, therefore, accounted for as liability awards and remeasured at each reporting date until settlement. Compensation expense recognized related to the performance units for the years ended December 31, 2012, 2011, and 2010 was $0.5 million, $2.1 million, and $2.7 million, respectively.
	As of December 31, 2012 and 2011, we had 7,657,479 and 8,669,723, respectively, common stock shares reserved for issuance. As of December 31, 2012 and 2011, we had no stock options outstanding or exercisable and we had 1,411,371 and 1,709,963 shares held in treasury stock, respectively.

Earnings_per_share_EPS

Earnings per share (EPS)	9 Months Ended									12 Months Ended
Earnings per share (EPS)	Sep. 30, 2013									Dec. 31, 2012
Earnings per share (EPS)	'									'
	3	Earnings per share (EPS)								Note 10 — Reconciliation of Income and Number of Shares Used to Calculate Basic and Diluted Earnings per Share (EPS)


			Three Months Ended September 30, 2013								For the Year Ended December 31, 2012
			Income		Shares		Per-Share				Income			Shares		Per-Share
			(Numerator)		(Denominator)		Amount				(Numerator)			(Denominator)		Amount
	Basic EPS		$	7,970,000		119,990,196	$	0.07		Basic EPS	$	37,313,000			117,721,135	$	0.32
	Effect of dilutive securities:									Effect of dilutive securities:
	Restricted stock			—		1,684,395		—		Stock options and restricted stock					1,372,455	$	(0.01	)

	Diluted EPS		$	7,970,000		121,674,591	$	0.07		Diluted EPS	$	37,313,000			119,093,590	$	0.31


											For the Year Ended December 31, 2011
			Nine Months Ended September 30, 2013								Income			Shares		Per-Share
			Income		Shares		Per-Share				(Numerator)			(Denominator)		Amount
			(Numerator)		(Denominator)		Amount			Basic EPS	$	(50,451,000	)		116,081,590	$	(0.43	)
	Basic EPS		$	16,843,000		119,443,260	$	0.14		Effect of dilutive securities:
	Effect of dilutive securities:									Stock options and restricted stock					—	$	—
	Restricted stock			—		2,250,521		—
										Diluted EPS:	$	(50,451,000	)		116,081,590	$	(0.43	)
	Diluted EPS		$	16,843,000		121,693,781	$	0.14

											For the Year Ended December 31, 2010
			Three Months Ended September 30, 2012								Income			Shares		Per-Share
			Income		Shares		Per-Share				(Numerator)			(Denominator)		Amount
			(Numerator)		(Denominator)		Amount			Basic EPS	$	(14,461,000	)		114,258,965	$	(0.13	)
	Basic EPS		$	10,936,000		118,109,214	$	0.09		Effect of dilutive securities:
	Effect of dilutive securities:									Stock options and restricted stock					—	$	—
	Restricted stock			—		1,091,805		—
										Diluted EPS:	$	(14,461,000	)		114,258,965	$	(0.13	)
	Diluted EPS		$	10,936,000		119,201,019	$	0.09		For the year ended December 31, 2012, weighted-average shares outstanding used in our computation of diluted EPS includes the dilutive effect of potential common shares. For the years ended December 31, 2011, and 2010, all potential common shares have been excluded from the calculation of weighted-average shares outstanding used in our computation of diluted EPS as the company incurred a loss for each year, and therefore, inclusion of potential common shares in the calculation of diluted EPS would be anti-dilutive.


			Nine Months Ended September 30, 2012
			Income		Shares		Per-Share
			(Numerator)		(Denominator)		Amount
	Basic EPS		$	57,411,000		117,458,365	$	0.49
	Effect of dilutive securities:
	Restricted stock			—		1,351,830		(0.01	)

	Diluted EPS		$	57,411,000		118,810,195	$	0.48

Employee_Benefit_Plan

Employee Benefit Plan	12 Months Ended
Employee Benefit Plan	Dec. 31, 2012
Employee Benefit Plan	'
	Note 11 — Employee Benefit Plan
	The Company sponsors a defined contribution 401(k) plan (Plan) in which substantially all U.S. employees are eligible to participate. The Company matches 100 percent of the first 4 percent and 50 percent of the next 2 percent of an employee’s pre-tax contributions. The costs of our matching contributions to the Plan were $2.8 million, $2.4 million and $2.4 million in 2012, 2011 and 2010, respectively. Employees become 100 percent vested in the employer match contributions immediately upon participation in the Plan. Coverage for office based employees begins on the date of hire. For rig-based and rental tools employees, coverage begins on the first of the month following completion of 30 calendar days of continuous full-time employment.

Reportable_Segments

Reportable Segments	9 Months Ended														12 Months Ended
Reportable Segments	Sep. 30, 2013														Dec. 31, 2012
Reportable Segments	'														'
	5	Reportable Segments													Note 12 — Reportable Segments
	We report our business activities in five business segments: (1) Rental Tools, (2) U.S. Barge Drilling, (3) U.S. Drilling, (4) International Drilling, and (5) Technical Services. We eliminate inter-segment revenues and expenses. The results of operations for ITS, acquired on April 22, 2013, are included in our Rental Tools segment.														We report our business activities in six business segments: (1) Rental tools, (2) U.S. barge drilling, (3) U.S. drilling, (4) International drilling, (5) Technical services, and (6) Construction contract. We eliminate inter-segment revenue and expenses. The following table represents the results of operations by reportable segment:

	The following table represents the results of operations by reportable segment:
																	Year Ended December 31,
															Operations by Reportable Industry Segment:		2012				2011				2010
			Three Months Ended						Nine Months Ended								(Dollars in Thousands)
			September 30,						September 30,						Revenues:
	Operations by Reportable Industry Segment		2013			2012			2013			2012			Rental Tools(1)		$	246,900			$	237,068			$	172,598
			(Dollars in Thousands)						(Dollars in Thousands)						U.S. Barge Drilling(1)			123,672				93,763				64,543
	Revenues:														U.S. Drilling(1)(3)			1,387				—				—
	Rental Tools		$	89,614		$	59,947		$	228,718		$	191,233		International Drilling(1)			291,772				318,482				294,821
	U.S. Barge Drilling			33,919			33,142			102,085			94,269		Technical Services(1)			14,251				27,695				36,423
	U.S. Drilling			18,693			—			48,238			—		Construction Contract(1)			—				9,638				91,090
	International Drilling(1)			88,562			68,503			236,394			224,176
	Technical Services			6,974			3,709			15,483			11,117		Total revenues			677,982				686,646				659,475

	Total revenues			237,762			165,301			630,918			520,795		Operating income:
															Rental Tools(2)			113,899				120,822				74,541
	Operating gross margin(2):														U.S. Barge Drilling(2)			39,774				11,116				(11,503	)
	Rental Tools			25,816			27,032			72,470			91,885		U.S. Drilling(2)			(15,168	)			(3,915	)			(217	)
	U.S. Barge Drilling			12,236			11,042			37,657			29,215		International Drilling(2)			12,642				22,237				5,092
	U.S. Drilling			103			(4,712	)		(4,618	)		(7,881	)	Technical Services(2)			(246	)			5,335				5,052
	International Drilling			9,831			783			12,815			21,395		Construction Contract(2)			—				771				202
	Technical Services			153			(107	)		584			(118	)
															Total operating gross margin			150,901				156,366				73,167
	Total operating gross margin			48,139			34,038			118,908			134,496		General and administrative expense			(46,052	)			(31,314	)			(30,728	)
	General and administrative expense			(14,188	)		(8,905	)		(49,449	)		(21,822	)	Impairments and other charges			—				(170,000	)			—
	Gain on disposition of assets, net			1,094			606			2,759			2,466		Provision for reduction in carrying value of certain assets			—				(1,350	)			(1,952	)
															Gain on disposition of assets, net			1,974				3,659				4,620
	Total operating income			35,045			25,739			72,218			115,140
	Interest expense			(13,127	)		(8,171	)		(33,874	)		(25,133	)	Total operating income (loss)			106,823				(42,639	)			45,107
	Interest income			130			30			2,392			109		Interest expense			(33,542	)			(22,594	)			(26,805	)
	Loss on extinguishment of debt			(5,218	)		(117	)		(5,218	)		(1,766	)	Changes in fair value of derivative positions			55				(110	)			—
	Changes in fair value of derivative positions			—			19			54			8		Loss on extinguishment of debt			(2,130	)			—				(7,209	)
	Other			400			26			333			62		Other			(229	)			(69	)			412

	Income before income taxes		$	17,230		$	17,526		$	35,905		$	88,420		Income (loss) from continuing operations before income taxes		$	70,977			$	(65,412	)		$	11,505



	Identifiable assets:		September 30,			December 31,											2012				2011
			2013			2012									Identifiable assets:
			(Dollars in Thousands)												Rental Tools		$	194,600			$	188,520
	Rental Tools		$	375,900		$	194,600								U.S. Barge Drilling			99,409				108,396
	U.S. Barge Drilling			84,402			99,409								U.S. Drilling			374,794				265,166
	U.S. Drilling			367,020			374,794								International Drilling			414,546				426,490
	International Drilling			466,356			414,546
															Total identifiable assets			1,083,349				988,572
	Total identifiable assets			1,293,678			1,083,349								Corporate and other assets(4)			172,384				227,674
	Corporate assets(3)			241,702			172,384
															Total assets		$	1,255,733			$	1,216,246
	Total assets		$	1,535,380		$	1,255,733

															1)	In 2012, our two largest customers, Exxon Neftegas Limited (ENL) and Schlumberger, constituted approximately 12 percent and 10 percent, respectively, of our total consolidated revenues and approximately 27 percent and 24 percent of our International Drilling segment, respectively. In 2011, our largest customer, ENL constituted approximately 16 percent of our total revenues and approximately 34 percent of our International Drilling segment. In 2010, our two largest customers BP and ExxonMobil both accounted for approximately 12 percent of the Company’s total revenues. In 2010, BP accounted for 90 percent of our construction contract segment revenues and ExxonMobil accounted for approximately 22 percent of our International Drilling segment and 7 percent of our Rental Tools segment.
		-1	For the nine months ended September 30, 2013, our largest customer, Exxon Neftegas Limited, constituted 14.3% of our total consolidated revenues and approximately 36.9% of our International Drilling segment. For the nine months ended September 30, 2012, our two largest customers, Exxon Neftegas Limited (ENL) and Schlumberger, constituted approximately 10.6% and 10.2%, respectively, of our total consolidated revenues and approximately 32.0% and 24.0%, respectively, of our International Drilling segments.												2)	Operating income is calculated as revenues less direct operating expenses, including depreciation and amortization expense.
		-2	Operating gross margin is calculated as revenues less direct operating expenses, including depreciation and amortization expense.												3)	As of December 31, 2011, this segment had not begun generating revenue.
		-3	This category includes corporate assets as well as minimal assets for our Technical Services segment primarily related to office furniture and fixtures.												4)	This category includes corporate assets as well as minimal assets for our Technical Services segment primarily related to office furniture and fixtures.


																	Year ended December 31,
															Operations by Reportable Industry Segment:		2012				2011				2010
																	(Dollars in Thousands)
														Capital expenditures:
														Rental Tools		$	61,958			$	61,702			$	48,872
														U.S. Barge Drilling			8,808				7,339				5,315
														U.S. Drilling			86,786				99,915				113,177
														International Drilling			15,240				15,011				50,482
														Corporate			18,751				6,432				1,338

														Total capital expenditures		$	191,543			$	190,399			$	219,184

														Depreciation and amortization:
														Rental Tools			42,944				40,497				36,558
														U.S. Barge Drilling			13,906				17,006				22,165
														U.S. Drilling			7,011				2,223				—
														International Drilling			45,967				48,965				52,429
														Corporate and other(1)			3,189				3,445				3,878

														Total depreciation and amortization		$	113,017			$	112,136			$	115,030


														1)	This category includes depreciation of corporate assets as well as minimal depreciation for our Technical Services segment primarily related to office furniture and fixtures.


																Year Ended December 31,
														Operations by Geographic Area:		2012				2011				2010
																(Dollars in Thousands)
														Revenues:
														Africa and Middle East		$	26,528			$	6,774			$	22,621
														Asia Pacific			39,400				38,477				26,416
														CIS			122,304				176,421				149,963
														Latin America			103,540				96,810				103,885
														United States			386,210				368,164				356,590

														Total revenues			677,982				686,646				659,475

														Operating gross margin:
														Africa and Middle East(1)			(2,234	)			(6,383	)			659
														Asia Pacific(1)			(927	)			1,933				2,374
														CIS(1)			6,840				26,402				8,139
														Latin America(1)			8,990				377				1,210
														United States(1)			138,232				134,037				60,785

														Total operating gross margin			150,901				156,366				73,167

														General and administrative expense			(46,052	)			(31,314	)			(30,728	)
														Impairments and other charges			—				(170,000	)			—
														Provision for reduction in carrying value of certain assets			—				(1,350	)			(1,952	)
														Gain on disposition of assets, net			1,974				3,659				4,620

														Total operating income (loss)			106,823				(42,639	)			45,107
														Interest expense			(33,542	)			(22,594	)			(26,805	)
														Changes in fair value of derivative positions			55				(110	)			—
														Loss on extinguishment of debt			(2,130	)			—				(7,209	)
														Other			(229	)			(69	)			412

														Income (loss) from continuing operations before income taxes		$	70,977			$	(65,412	)		$	11,505

														Long-lived assets:(2)
														Africa and Middle East		$	25,032			$	28,427
														Asia Pacific			15,723				18,300
														CIS			106,774				119,282
														Latin America			63,899				57,710
														United States			574,730				496,090

														Total long-lived assets		$	786,158			$	719,809


														1)	Operating income is calculated as revenues less direct operating expenses, including depreciation and amortization expense.
														2)	Long-lived assets primarily consist of property, plant and equipment, net and exclude assets held for sale, if any.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended		12 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Commitments and Contingencies	'		'
	12	Commitments and Contingencies	Note 13 — Commitments and Contingencies
	Asbestos-Related Claims		The Company has various lease agreements for office space, equipment, vehicles and personal property. These obligations extend through 2013 and are typically non-cancelable. Most leases contain renewal options and certain of the leases contain escalation clauses. Future minimum lease payments at December 31, 2012, under operating leases with non-cancelable terms are as follows:
	We are from time to time a party to various lawsuits in the ordinary course that are incidental to our operations in which the claimants seek an unspecified amount of monetary damages for personal injury, including injuries purportedly resulting from exposure to asbestos on drilling rigs and associated facilities. At September 30, 2013, there were approximately 15 of these lawsuits in which we are one of many defendants. These lawsuits have been filed in the United States in the States of Illinois and Mississippi.
				Year Ended
	We intend to defend ourselves vigorously and, based on the information available to us at this time, we do not expect the outcome to have a material adverse effect on our financial condition, results of operations or cash flows. However, we are unable to predict the ultimate outcome of these lawsuits. No amounts were accrued at September 30, 2013.			December 31,
	Gulfco Site			(Dollars in Thousands)
	In 2003, we received an information request under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) designating Parker Drilling Offshore Corporation, a subsidiary of Parker Drilling, as a potentially responsible party with respect to the Gulfco Marine Maintenance, Inc. Superfund Site in Freeport, Texas (EPA No. TX 055144539). We responded to this request and in January 2008 received an administrative order to participate in an investigation of the site and a study of the remediation needs and alternatives. The EPA alleges that our subsidiary is a successor to a party who owned the Gulfco site during the time when chemical releases took place there. In December 2010, we entered into an agreement with two other potentially responsible parties, pursuant to which we agreed to pay 20 percent of past and future costs to study and remediate the site. The EPA also issued notice letters to several other parties who may also participate in funding the site remediation costs. On March 20, 2013 we received a Notice of Completion from the EPA confirming that all required activity for removal and remediation has been completed, except for ongoing monitoring costs. As of September 30, 2013, the Company had made certain participating payments and had accrued $0.9 million for our portion of certain unreimbursed past costs and the estimated future cost of monitoring.		2013	$	6,734
	Customs Agent and Foreign Corrupt Practices Act (FCPA) Settlement		2014		4,134
	We previously announced we reached a settlement in connection with investigations by the United States Department of Justice (DOJ) and the United States Securities and Exchange Commission (SEC) regarding possible violations of U.S. law, including the FCPA, by us. On April 16, 2013, the Company and the DOJ entered into a deferred prosecution agreement (DPA), under which the DOJ will defer for three years prosecuting the Company for criminal violations of the anti-bribery provisions of the FCPA relating to the Company’s retention and use of an individual agent in Nigeria with respect to certain customs-related issues, in return for: (i) the Company’s acceptance of responsibility for, and agreement not to contest or contradict the truthfulness of, the statement of facts and allegations that have been filed in a United States District Court concurrently with the DPA; (ii) the Company’s payment of an approximately $11.76 million fine; (iii) the Company’s reaffirming its commitment to compliance with the FCPA and other applicable anti-corruption laws in connection with the Company’s operations, and continuing cooperation with domestic and foreign authorities in connection with the matters that are the subject of the DPA; (iv) the Company’s commitment to continue to address any identified areas for improvement in the Company’s internal controls, policies and procedures relating to compliance with the FCPA and other applicable anti-corruption laws if, and to the extent, not already addressed; and (v) the Company’s agreement to report to the DOJ in writing annually during the term of the DPA regarding remediation of the matters that are the subject of the DPA, implementation of any enhanced internal controls, and any evidence of improper payments the Company may have discovered during the term of the agreement. If the Company remains in compliance with the terms of the DPA throughout its effective period, the charge against the Company will be dismissed with prejudice. The Company also settled a related civil complaint filed by the SEC in a United States District Court.		2015		3,851
	Demand Letter and Derivative Litigation		2016		2,742
	In April 2010, we received a demand letter from a law firm representing Ernest Maresca. The letter states that Mr. Maresca is one of our stockholders and that he believes that certain of our current and former officers and directors violated their fiduciary duties related to the issues described above under “Customs Agent and Foreign Corrupt Practices Act (FCPA) Settlement.” The letter requests that our Board of Directors take action against the individuals in question. In response to this letter, the Board formed a special committee to investigate the issues raised in the letter and recommend a course of action for the Company. The special committee engaged its own counsel for the investigation and evaluated potential claims against all individuals identified in the demand letter. The special committee considered whether pursuing each of the individuals named in the demand letter was in the best interests of the Company based upon a variety of factors, including among others, whether the Company had a potential cause of action against the individual, the defenses the individual might offer to such a claim, the ability of the individual to satisfy any judgment the Company might secure as a result of a claim asserted, and other risks to the Company of pursuing the claims. After taking various factors into account, on July 29, 2013, the special committee recommended to the Board that the Company not pursue any action against the current and former officers and directors named in the demand letter, and the Board accepted such recommendation.		2017		2,092
	ITS Internal Controls		Thereafter		8,209
	Our due diligence process with respect to the ITS Acquisition identified certain transactions that suggest that ITS’ internal controls may have failed to prevent violations of potentially applicable international trade and anti-corruption laws, including those of the United Kingdom. As part of the integration process with respect to ITS, we have and will continue our review of ITS’ activities to further identify potential violations of applicable international trade and anti-corruption laws and have and will continue to promptly apply our developed systems of internal controls, Code of Conduct, policies and procedures to the acquired businesses to help ensure prevention of potential future violations. As appropriate, we have and will make any identified violations known to relevant authorities, cooperate with any resulting investigations and take proper remediation measures (including seeking any necessary government authorizations). While it is possible that matters may arise where a contingency may require further accounting considerations, we do not believe that as a result of these matters a loss is probable nor is a loss estimable at this time.
			Total	$	27,762

			Total rent expense for all operating leases amounted to $11.8 million for 2012, $12.1 million for 2011 and $12.0 million for 2010.
			We are self-insured for certain losses relating to workers’ compensation, employers’ liability, general liability (for onshore liability), protection and indemnity (for offshore liability) and property damage. Our exposure (that is, the retention or deductible) per occurrence is $250,000 for worker’s compensation, employer’s liability, general liability, protection and indemnity and maritime employers’ liability (Jones Act). In addition, we assume a $500,000 annual aggregate deductible for protection and indemnity and maritime employers’ liability claims. The annual aggregate deductible is reduced by every dollar that exceeds the $250,000 per occurrence retention. We continue to assume a retention of $250,000 for workers’ compensation, employers’ liability, and general liability losses and a $100,000 deductible for auto liability claims. For all primary insurances mentioned above, the Company has excess coverage for those claims that exceed the retention and annual aggregate deductible. We maintain actuarially-determined accruals in our consolidated balance sheets to cover the self-insurance retentions.
			We have self-insured retentions for certain other losses relating to rig, equipment, property, business interruption and political, war, and terrorism risks which vary according to the type of rig and line of coverage. Political risk insurance is procured for international operations. However, this coverage may not adequately protect us against liability from all potential consequences.
			As of December 31, 2012 and 2011, our gross self-insurance accruals for workers’ compensation, employers’ liability, general liability, protection and indemnity and maritime employers’ liability totaled $4.7 million and $6.6 million, respectively and the related insurance recoveries/receivables were $1.2 million and $1.9 million, respectively.
			We have entered into employment agreements with terms of one to two years with certain members of management with automatic one year renewal periods at expiration dates. The agreements provide for, among other things, compensation, benefits and severance payments. The employment agreements also provide for lump sum compensation and benefits in the event of termination within two years following a change in control of the Company.
			We are a party to various lawsuits and claims arising out of the ordinary course of business. We estimate the range of our liability related to pending litigation when we believe the amount or range of loss can be estimated. We record our best estimate of a loss when the loss is considered probable. When a liability is probable and there is a range of estimated loss with no best estimate in the range, we record the minimum estimated liability related to the lawsuits or claims. As additional information becomes available, we assess the potential liability related to our pending litigation and claims and revise our estimates. Due to uncertainties related to the resolution of lawsuits and claims, the ultimate outcome may differ significantly from our estimates. In the opinion of management and based on liability accruals provided, our ultimate exposure with respect to these pending lawsuits and claims is not expected to have a material adverse effect on our consolidated financial position or cash flows, although they could have a material adverse effect on our results of operations for a particular reporting period.
			Asbestos-Related Claims
			We are from time to time a party to various lawsuits that are incidental to our operations in which the claimants seek an unspecified amount of monetary damages for personal injury, including injuries purportedly resulting from exposure to asbestos on drilling rigs and associated facilities. At December 31, 2012, there were approximately 15 of these lawsuits in which we are one of many defendants. These lawsuits have been filed in the United States in the State of Mississippi.
			The subsidiaries named in these asbestos-related lawsuits intend to defend themselves vigorously and, based on the information available to us at this time, we do not expect the outcome to have a material adverse effect on our financial condition, results of operations or cash flows. However, we are unable to predict the ultimate outcome of these lawsuits. No amounts were accrued at December 31, 2012.
			Gulfco Site
			In 2003, we received an information request under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) designating Parker Drilling Offshore Corporation, a subsidiary of Parker Drilling, as a potentially responsible party with respect to the Gulfco Marine Maintenance, Inc. Superfund Site in Freeport, Texas (EPA No. TX 055144539). We responded to this request and in January 2008 received an administrative order to participate in an investigation of the site and a study of the remediation needs and alternatives. The EPA alleges that our subsidiary is a successor to a party who owned the Gulfco site during the time when chemical releases took place there. In December 2010, we entered into an agreement with two other potentially responsible parties, pursuant to which we agreed to pay 20 percent of past and future costs to study and remediate the site. The EPA also issued notice letters to several other parties who may also participate in funding the site remediation costs. As of December 31, 2012, the Company had made certain participating payments and had accrued $0.7 million for our portion of certain unreimbursed past costs and the estimated future cost of remediation. To date, we believe that all required activity for removal and remediation has been completed, except for ongoing monitoring costs, and we are awaiting a Notice of Completion from the EPA.
			Customs Agent and Foreign Corrupt Practices Act (FCPA) Investigation
			As previously disclosed, we have engaged in settlement discussions with the United States Department of Justice (DOJ) and the United States Securities and Exchange Commission (SEC) related to parallel investigations that they conducted regarding possible violations of U.S. law, including the FCPA, by us. In particular, the DOJ and the SEC investigated certain of our operations relating to countries in which we currently operate or formerly operated, including Kazakhstan and Nigeria. We fully cooperated with the DOJ and SEC investigations and conducted an internal investigation into potential customs and other issues in Kazakhstan and Nigeria. Subject to court and regulatory approvals, we have reached agreement in principle regarding a proposed settlement of these matters with the DOJ and the staff of the SEC.
			Under the terms of the proposed resolution with the DOJ, it is expected that the Company would enter into a deferred prosecution agreement (DPA), under which the DOJ would defer for three years prosecuting the Company for criminal violations of the anti-bribery provisions of the FCPA relating to the Company’s retention and use of an individual agent in Nigeria with respect to certain customs-related issues, in return for: (i) the Company’s acceptance of responsibility for, and agreement not to contest or contradict the truthfulness of, the statement of facts and allegations to be filed in a United States District Court concurrently with the DPA; (ii) the Company’s payment of an approximately $11.76 million fine; (iii) the Company’s reaffirming its commitment to compliance with the FCPA and other applicable anti-corruption laws in connection with the Company’s operations, and continuing cooperation with domestic and foreign authorities in connection with the matters that are the subject of the DPA; (iv) the Company’s commitment to continue to address any identified areas for improvement in the Company’s internal controls, policies and procedures relating to compliance with the FCPA and other applicable anti-corruption laws if, and to the extent, not already addressed; and (v) the Company’s agreement to report to the DOJ in writing annually during the term of the DPA regarding remediation of the matters that are the subject of the DPA, implementation of any enhanced internal controls, and any evidence of improper payments the Company may have discovered during the term of the agreement. If the Company remains in compliance with the terms of the DPA throughout its effective period, the charge against the Company would be dismissed with prejudice.
			Under the terms of the proposed resolution with SEC, the staff of the SEC has agreed to recommend to its governing Commission that the SEC enter into a settlement with the Company, pursuant to which the SEC will file a civil complaint in a United States District Court charging the Company with violations of the anti-bribery, books and records and internal control provisions of the FCPA, and the Company would consent to the entry of a final judgment of permanent injunction barring future violations of the anti-bribery, books and records and internal controls provisions of the FCPA. The Company also would agree to the payment of disgorgement of approximately $3.05 million and prejudgment interest of approximately $1.04 million, for a total of approximately $4.09 million. The proposed agreement with the SEC would not require the payment of a civil monetary fine, and neither the proposed agreement with the DOJ nor the proposed agreement with the SEC would require the appointment of a monitor to oversee the Company’s activities or compliance with applicable laws.
			The agreement in principle is contingent upon the parties’ preparation and agreement on the language of the settlement documents, approval of the civil settlement by the SEC’s governing Commission and by a United States District Court. There can be no assurance that this proposed settlement will be finalized, or finalized on the terms currently agreed in principle, and we cannot provide assurances regarding if and when the court and/or the SEC’s governing Commission will approve the settlement.
			If one or both of these approvals do not occur, the Company may enter further discussions with the DOJ and/or the SEC to resolve the investigated matters on different terms and conditions; such terms and conditions could include any of a broad range of civil and criminal sanctions under the FCPA and other laws and regulations, which they may seek to impose against corporations and individuals in appropriate circumstances. These include, but are not limited to, injunctive relief, disgorgement, fines, penalties and modifications to business practices and compliance programs. Any such disgorgement, fines, penalties, interest or other associated costs could be materially higher than the amounts that we have currently accrued. The DOJ and the SEC have entered into agreements with, and obtained a range of sanctions against, several public corporations and individuals arising from allegations of improper payments and deficiencies in books and records and internal controls, whereby civil and criminal penalties were imposed. Recent civil and criminal settlements have included multi-million dollar fines, deferred prosecution agreements, guilty pleas, and other sanctions, including the requirement that the relevant corporation retain a monitor to oversee its compliance with the FCPA. In addition, corporations may have to end or modify existing business relationships. The Company could also face fines, sanctions and other penalties imposed by other regulatory authorities or in other legal actions. Any such fines, sanctions or penalties could impact the Company’s business operations and assets, particularly in jurisdictions outside the United States, and could have a material adverse impact on our business, results of operations, financial condition and liquidity.
			As previously disclosed, we have taken and continue to take certain steps to enhance our existing anti-bribery compliance efforts, including retaining a full-time Chief Compliance Officer who reports to the Chief Executive Officer and Audit Committee and full-time staff to assist him; adopting revised FCPA policies, procedures, and controls; increasing training and testing requirements; strengthening contractual provisions for our service providers that interface with foreign government officials; improving due diligence and continuing oversight procedures for the review and selection of such service providers; and implementing a compliance awareness improvement initiative that includes issuance of periodic anti-bribery compliance alerts. We will continue to emphasize the importance of compliance and ethical business conduct.
			The Company recorded a charge of $15.85 million associated with the proposed settlement with the DOJ and SEC for the fourth quarter of 2012. Such charge, which is included in general and administrative expenses, is subject to change based on the results of any final settlement with DOJ and SEC relating to these matters.
			Demand Letter and Derivative Litigation
			In April 2010, we received a demand letter from a law firm representing Ernest Maresca. The letter states that Mr. Maresca is one of our stockholders and that he believes that certain of our current and former officers and directors violated their fiduciary duties related to the issues described above under “Customs Agent and Foreign Corrupt Practices Act (FCPA) Investigation.” The letter requests that our Board of Directors take action against the individuals in question. In response to this letter, the Board formed a special committee to evaluate the issues raised by the letter and determine a course of action for the Company, and such committee’s work is ongoing.
			On August 31, 2010, Douglas Freuler, a purported stockholder of the Company, filed a derivative action in the United States District Court for the Southern District of Texas against our current directors, select officers, and the Company as a nominal defendant. The lawsuit alleges that the individuals breached their fiduciary duties to the Company related to the issues described above under “Customs Agent and Foreign Corrupt Practices Act (FCPA) Investigation,” as well as abuse of control, gross mismanagement, waste of corporate assets, and unjust enrichment. The damages sought included both compensatory and exemplary damages in an unspecified amount, along with various other forms of relief and an award of attorney fees, other costs, and expenses to the plaintiffs. Defendants’ motions to dismiss the amended complaint were granted on June 30, 2011, and plaintiff was given thirty days to replead. Mr. Freuler filed his second amended complaint on July 20, 2011. Defendants’ motions to dismiss the second amended complaint were granted on March 14, 2012. The matter is now on appeal before the U.S. Court of Appeals for the Fifth Circuit, and oral argument in the matter will be heard on March 5, 2013.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2012
Related Party Transactions	'
	Note 14 — Related Party Transactions
	Consulting Agreement
	The Company was a party to a consulting agreement with Robert L. Parker Sr., the former Chairman of the Board of Directors of the Company and the father of our current Executive Chairman, Robert L. Parker Jr. The consulting agreement expired on April 30, 2011. Under the agreement, Mr. Parker Sr. was paid consulting fees of $40,000, and $123,750 in the years ending December 31, 2011 and 2010, respectively. For one year after the termination of the consulting agreement, Mr. Parker Sr. was prohibited from soliciting business from any of our customers or individuals with which we have done business, from becoming interested in any business that competes with the Company, and from recruiting any employees of the Company. Under the consulting agreement, Mr. Parker Sr. also represented the Company on the U.S.-Kazakhstan Business Council. In addition, we pay a monthly rental fee to Mr. Parker Sr. for various pieces of artwork which are displayed throughout our corporate office. In 2012, 2011, and 2010 we paid Mr. Parker $36,000, $36,000, and $30,000, respectively for the artwork rental.
	Effective January 1, 2012, the Company entered into two separate ranch lease agreements under which the Company agreed to pay a daily usage fee per person for utilization of the Cypress Springs Ranch owned by the Robert L. Parker, Sr. and Catherine M. Parker Family Limited Partnership and the Camp Verde Ranch owned by Robert L. Parker, Jr. During 2012, the Company incurred fees of $39,875 and $1,650 for the Cypress Springs Ranch and Camp Verde Ranch, respectively, pursuant to the ranch lease agreements for the right to utilize the premises of the ranches for the purpose of hosting business meetings.
	Other Related Party Agreements
	During 2012 and 2011, one of the Company’s directors held executive positions at Apache Corporation (Apache), including the positions of President and Chief Corporate Officer, Executive Vice President and Chief Financial Officer and Chief Corporate Officer. During 2012 and 2011, affiliates of Apache paid affiliates of the Company a total of $31.2 million and $22.7 million, respectively, for performance of drilling services and provision of rental tools. This information is considered and discussed annually in connection with the Board of Directors’ assessment of facts and circumstances that could preclude a determination that such director is independent under the New York Stock Exchange governance listing standards.

Supplementary_Information

Supplementary Information	12 Months Ended
Supplementary Information	Dec. 31, 2012
Supplementary Information	'
	Note 15 — Supplementary Information
	At December 31, 2012, accrued liabilities included $1.6 million of deferred mobilization fees, $9.7 million of accrued interest expense, $2.3 million of worker’s compensation liabilities and $26.0 million of accrued payroll and payroll taxes. Other long-term obligations included $2.5 million of workers’ compensation liabilities as of December 31, 2012.
	At December 31, 2011, accrued liabilities included $2.2 million of deferred mobilization fees, $8.1 million of accrued interest expense, $3.0 million of worker’s compensation liabilities and $26.8 million of accrued payroll and payroll taxes. Other long-term obligations included $3.6 million of workers’ compensation liabilities as of December 31, 2011.

Parent_Guarantor_NonGuarantor_

Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements	9 Months Ended																					12 Months Ended
	Sep. 30, 2013																					Dec. 31, 2012
Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements	'																					'
	14	Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements																				Note 16 — *Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements*
	Set forth on the following pages are the consolidating condensed financial statements of Parker Drilling. Our loans pursuant to the Credit Agreement, the 9.125% Notes, and the 7.50% Notes are guaranteed by substantially all of our direct and indirect domestic subsidiaries other than immaterial subsidiaries and subsidiaries generating revenues primarily outside the United States. There are currently no restrictions on the ability of the guarantor to transfer funds to Parker Drilling in the form of cash dividends, loans or advances. Parker Drilling is a holding company with no operations, other than through its subsidiaries. Separate financial statements for each guarantor company are not provided as the Company complies with the exception to Rule 3-10(a)(1) of Regulation S-X, set forth in sub-paragraph (f) of such rule. All guarantor subsidiaries are owned 100 percent by Parker Drilling, all guarantees are full and unconditional and all guarantees are joint and several.																					Set forth on the following pages are the consolidating condensed financial statements of Parker Drilling. The Company’s 9.125% Notes are guaranteed by substantially all of the restricted subsidiaries of Parker Drilling. There are currently no restrictions on the ability of the restricted subsidiaries to transfer funds to Parker Drilling in the form of cash dividends, loans or advances. Parker Drilling is a holding company with no operations, other than through its subsidiaries. Separate financial statements for each guarantor company are not provided as the company complies with the exception to Rule 3-10(a)(1) of Regulation S-X, set forth in sub-paragraph (f) of such rule. All guarantor subsidiaries are owned 100 percent by the parent company, all guarantees are full and unconditional and all guarantees are joint and several.
	We are providing consolidating condensed financial information of Parker Drilling, the guarantor subsidiaries, and the non-guarantor subsidiaries as of September 30, 2013 and December 31, 2012 and for the three and nine months ended September 30, 2013 and 2012. The consolidating condensed financial statements present investments in both consolidated and unconsolidated subsidiaries using the equity method of accounting.																					We are providing consolidating condensed financial information of the parent, Parker Drilling, the guarantor subsidiaries, and the non-guarantor subsidiaries as of December 31, 2012 and December 31, 2011 and for the years ended December 31, 2012, 2011, and 2010. The consolidating condensed financial statements present investments in both consolidated and unconsolidated subsidiaries using the equity method of accounting.
	PARKER DRILLING COMPANY AND SUBSIDIARIES																					PARKER DRILLING COMPANY AND SUBSIDIARIES
	CONSOLIDATING CONDENSED BALANCE SHEET																					CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS
	(Dollars in Thousands)																					(Dollars in Thousands)
	(Unaudited)																					(Unaudited)

			30-Sep-13																					Year ended December 31, 2012
			Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated					Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
	ASSETS																					Total revenues		$	—			$	393,959			$	385,279			$	(101,256	)		$	677,982
	Current assets:																					Operating expenses			—				185,328				329,992				(101,256	)			414,064
	Cash and cash equivalents		$	89,516			$	21,273			$	51,668			$	—			$	162,457		Depreciation and amortization			—				65,354				47,663				—				113,017
	Accounts and notes receivable, net			290,856				113,873				386,521				(541,627	)			249,623
	Rig materials and supplies			—				2,364				37,838				—				40,202		Total operating gross margin			—				143,277				7,624				—				150,901
	Deferred costs			—				32				13,551				—				13,583
	Deferred income taxes			—				12,363				1,110				—				13,473		General and administration expense(1)			(182	)			(45,433	)			(437	)			—				(46,052	)
	Other tax assets			43,171				(46,939	)			22,201				—				18,433		Gain on disposition of assets, net			—				775				1,199				—				1,974
	Assets held for sale			—				1,183				6,302				—				7,485
	Other current assets			—				14,238				6,668				—				20,906		Total operating income (loss)			(182	)			98,619				8,386				—				106,823

	Total current assets			423,543				118,387				525,859				(541,627	)			526,162		Other income and (expense):
																						Interest expense			(37,326	)			(151	)			(8,739	)			12,674				(33,542	)
	Property, plant and equipment, net			60				559,885				298,727				—				858,672		Changes in fair value of derivative positions			55				—				—				—				55
	Investment in subsidiaries and intercompany advances			944,584				(220,110	)			1,593,743				(2,318,217	)			—		Interest income			9,863				5,073				41,999				(56,782	)			153
	Other noncurrent assets			52,147				60,002				38,397				—				150,546		Loss on extinguishment of debt			(2,130	)			—				—				—				(2,130	)
																						Other			—				(370	)			(12	)			—				(382	)
	Total assets		$	1,420,334			$	518,164			$	2,456,726			$	(2,859,844	)		$	1,535,380		Equity in net earnings of subsidiaries			43,884				—				—				(43,884	)			—

	LIABILITIES AND STOCKHOLDERS’ EQUITY																					Total other income (expense)			14,346				4,552				33,248				(87,992	)			(35,846	)
	Current liabilities:
	Current portion of long-term debt		$	—			$	—			$	—			$	—			$	—		Income (benefit) before income taxes			14,164				103,171				41,634				(87,992	)			70,977
	Accounts payable and accrued liabilities			81,524				101,207				263,709				(255,211	)			191,229		Income tax expense (benefit):
	Accrued income taxes			—				529				6,732				—				7,261		Current			(25,406	)			32,781				10,667				—				18,042
																						Deferred			2,257				15,429				(1,849	)			—				15,837
	Total current liabilities			81,524				101,736				270,441				(255,211	)			198,490
																						Income tax expense (benefit)			(23,149	)			48,210				8,818				—				33,879
	Long-term debt			653,968				—				—				—				653,968
	Other long-term liabilities			4,289				5,806				13,953				—				24,048		Net income (loss)			37,313				54,961				32,816				(87,992	)			37,098
	Long-term deferred tax liability			—				47,684				(8,600	)			—				39,084
	Intercompany payables			62,584				43,669				359,106				(465,359	)			—		Less: Net (loss) attributable to noncontrolling interest			—				—				(215	)			—				(215	)
	Contingencies			—				—				—				—				—
	Stockholders’ equity:																					Net income (loss) attributable to controlling interest		$	37,313			$	54,961			$	33,031			$	(87,992	)		$	37,313
	Common stock			20,050				18,049				43,003				(61,052	)			20,050
	Capital in excess of par value			654,750				733,899				1,579,458				(2,313,357	)			654,750		-1	General and administration expenses for field operations are included in operating expenses.
	Accumulated other comprehensive income			—				—				957				—				957		PARKER DRILLING COMPANY AND SUBSIDIARIES
	Retained earnings (accumulated deficit)			(56,831	)			(432,679	)			196,587				235,135				(57,788	)	CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS
																						(Dollars in Thousands)
	Total controlling interest stockholders’ equity			617,969				319,269				1,820,005				(2,139,274	)			617,969		(Unaudited)

	Noncontrolling interest			—				—				1,821				—				1,821				Year ended December 31, 2011
																								Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
	Total equity			617,969				319,269				1,821,826				(2,139,274	)			619,790		Total revenues		$	—			$	376,229			$	426,491			$	(116,074	)		$	686,646
																						Operating expenses			—				175,465				358,753				(116,074	)			418,144
	Total liabilities and stockholders’ equity		$	1,420,334			$	518,164			$	2,456,726			$	(2,859,844	)		$	1,535,380		Depreciation and amortization			—				62,744				49,392				—				112,136

	PARKER DRILLING COMPANY AND SUBSIDIARIES																					Total operating gross margin			—				138,020				18,346				—				156,366
	CONSOLIDATING CONDENSED BALANCE SHEET
	(Dollars in Thousands)																					General and administration expense(1)			(218	)			(30,859	)			(237	)			—				(31,314	)
	(Unaudited)																					Impairment and other charges			—				(170,000	)			—				—				(170,000	)
																						Provision for reduction in carrying value of certain assets			—				(1,350	)			—				—				(1,350	)
			31-Dec-12																			Gain on disposition of assets, net			—				2,706				953				—				3,659
			Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
ASSETS																					Total operating income (loss)			(218	)			(61,483	)			19,062				—				(42,639	)
Current assets:
Cash and cash equivalents		$	42,251			$	11,023			$	34,612			$	—			$	87,886		Other income and (expense):
Accounts and notes receivable, net			289,957				98,747				292,644				(512,786	)			168,562		Interest expense			(26,654	)			(17,889	)			(8,865	)			30,814				(22,594	)
Rig materials and supplies			—				2,834				26,026				—				28,860		Changes in fair value of derivative positions			(110	)			—				—				—				(110	)
Deferred costs			—				—				1,089				—				1,089		Interest income			18,131				750				12,189				(30,814	)			256
Deferred income taxes			—				7,615				1,127				—				8,742		Other			—				(345	)			20				—				(325	)
Other tax assets			46,249				(31,136	)			18,411				—				33,524		Equity in net earnings of subsidiaries			(23,484	)			—				—				23,484				—
Assets held for sale			—				—				6,800				—				6,800
Other current assets			—				8,675				4,146				—				12,821		Total other income and (expense)			(32,117	)			(17,484	)			3,344				23,484				(22,773	)

Total current assets			378,457				97,758				384,855				(512,786	)			348,284		Income (benefit) before income taxes			(32,335	)			(78,967	)			22,406				23,484				(65,412	)
																					Income tax expense (benefit):
Property, plant and equipment, net			60				548,794				240,269				—				789,123		Current			(13,402	)			27,169				19,841				—				33,608
Investment in subsidiaries and intercompany advances			780,878				(233,388	)			1,467,429				(2,014,919	)			—		Deferred			31,518				(57,030	)			(22,863	)			—				(48,375	)
Other noncurrent assets			43,569				59,541				15,216				—				118,326
																					Total income tax expense (benefit)			18,116				(29,861	)			(3,022	)			—				(14,767	)
Total assets		$	1,202,964			$	472,705			$	2,107,769			$	(2,527,705	)		$	1,255,733
																					Net income (loss)			(50,451	)			(49,106	)			25,428				23,484				(50,645	)
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:																					Less: Net (loss) attributable to noncontrolling interest			—				—				(194	)			—				(194	)
Current portion of long-term debt		$	10,000			$	—			$	—			$	—			$	10,000
Accounts payable and accrued liabilities			65,839				93,243				205,864				(227,200	)			137,746		Net income (loss) attributable to controlling interest		$	(50,451	)		$	(49,106	)		$	25,622			$	23,484			$	(50,451	)
Accrued income taxes			—				612				3,508				—				4,120
																					-1	General and administration expenses for field operations are included in operating expenses.
Total current liabilities			75,839				93,855				209,372				(227,200	)			151,866		PARKER DRILLING COMPANY AND SUBSIDIARIES
																					CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS
Long-term debt			469,205				—				—				—				469,205		(Dollars in Thousands)
Other long-term liabilities			3,933				6,129				13,120				—				23,182		(Unaudited)
Long-term deferred tax liability			—				36,894				(16,047	)			—				20,847
Intercompany payables			62,583				43,657				216,320				(322,560	)			—				Twelve months ended December 31, 2010
Contingencies			—				—				—				—				—				Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
Stockholders’ equity:																					Total revenues		$	—			$	366,947			$	401,617			$	(109,089	)		$	659,475
Common stock			19,818				18,049				43,003				(61,052	)			19,818		Operating expenses			—				237,584				342,783				(109,089	)			471,278
Capital in excess of par value			646,217				733,112				1,455,246				(2,188,358	)			646,217		Depreciation and amortization			—				63,402				51,628				—				115,030
Accumulated other comprehensive income			—				—				—				—				—
Retained earnings (accumulated deficit)			(74,631	)			(458,991	)			187,526				271,465				(74,631	)	Total operating gross margin			—				65,961				7,206				—				73,167

Total controlling interest stockholders’ equity			591,404				292,170				1,685,775				(1,977,945	)			591,404		General and administration expense(1)			(225	)			(30,193	)			(310	)			—				(30,728	)
																					Provision for reduction in carrying value of certain assets			—				(1,952	)			—				—				(1,952	)
Noncontrolling interest			—				—				(771	)			—				(771	)	Gain on disposition of assets, net			—				2,067				2,553				—				4,620

Total Equity			591,404				292,170				1,685,004				(1,977,945	)			590,633		Total operating income (loss)			(225	)			35,883				9,449				—				45,107

Total liabilities and stockholders’ equity		$	1,202,964			$	472,705			$	2,107,769			$	(2,527,705	)		$	1,255,733		Other income and (expense):
																					Interest expense			(30,771	)			(35,640	)			(16,185	)			55,791				(26,805	)
PARKER DRILLING COMPANY AND SUBSIDIARIES																					Interest income			42,000				757				23,291				(65,791	)			257
CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS																					Loss on extinguishment of debt			(7,209	)			—				—				—				(7,209	)
(Dollars in Thousands)																					Other			—				88				67				—				155
(Unaudited)																					Equity in net earnings of subsidiaries			(22,962	)			—				—				22,962				—

		Three months ended September 30, 2013																			Total other income and (expense)			(18,942	)			(34,795	)			7,173				12,962				(33,602	)
		Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
Total revenues		$	—			$	119,223			$	170,609			$	(52,070	)		$	237,762		Income (benefit) before income taxes			(19,167	)			1,088				16,622				12,962				11,505
Operating expenses			—				64,297				141,514				(52,070	)			153,741		Income tax expense (benefit):
Depreciation and amortization			—				19,956				15,926				—				35,882		Current			139				(189	)			27,571				—				27,521
																					Deferred			(4,845	)			2,323				1,214				—				(1,308	)
Total operating gross margin			—				34,970				13,169				—				48,139
																					Total income tax expense (benefit)			(4,706	)			2,134				28,785				—				26,213
General and administration expense(1)			(47	)			(14,028	)			(113	)			—				(14,188	)
Gain on disposition of assets, net			—				(34	)			1,128				—				1,094		Net income (loss)			(14,461	)			(1,046	)			(12,163	)			12,962				(14,708	)

Total operating income (loss)			(47	)			20,908				14,184				—				35,045		Less: Net (loss) attributable to noncontrolling interest			—				—				(247	)			—				(247	)
Other income and (expense):
Interest expense			(14,035	)			(107	)			(2,198	)			3,213				(13,127	)	Net income (loss) attributable to controlling interest		$	(14,461	)		$	(1,046	)		$	(11,916	)		$	12,962			$	(14,461	)
Interest income			360				250				2,733				(3,213	)			130
Extinguishment of debt			(5,218	)			—				—				—				(5,218	)	-1	General and administration expenses for field operations are included in operating expenses.
Changes in fair value of derivative positions			—				—				—				—				—		PARKER DRILLING COMPANY AND SUBSIDIARIES
Other			(1	)			(11	)			412				—				400		CONSOLIDATING CONDENSED BALANCE SHEET
Equity in net earnings of subsidiaries			22,322				—				—				(22,322	)			—		(Dollars in Thousands)
																					(Unaudited)
Total other income (expense)			3,428				132				947				(22,322	)			(17,815	)
																							31-Dec-12
Income (benefit) before income taxes			3,381				21,040				15,131				(22,322	)			17,230				Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
																					ASSETS
Total income tax expense (benefit)			(4,589	)			10,223				3,478				—				9,112		Current assets:
																					Cash and cash equivalents		$	42,251			$	11,023			$	34,612			$	—			$	87,886
Net income (loss)			7,970				10,817				11,653				(22,322	)			8,118		Accounts and notes receivable, net			289,957				98,747				292,644				(512,786	)			168,562
																					Rig materials and supplies			—				2,834				26,026				—				28,860
Less: Net income (loss) attributable to noncontrolling interest			—				—				148				—				148		Deferred costs			—				—				1,089				—				1,089
																					Deferred income taxes			—				7,615				1,127				—				8,742
Net income (loss) attributable to controlling interest		$	7,970			$	10,817			$	11,505			$	(22,322	)		$	7,970		Other tax assets			46,249				(31,136	)			18,411				—				33,524
																					Assets held for sale			—				—				11,550				—				11,550
-1	General and administration expenses for field operations are included in operating expenses.																				Other current assets			—				8,675				4,146				—				12,821
PARKER DRILLING COMPANY AND SUBSIDIARIES
CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS																					Total current assets			378,457				97,758				389,605				(512,786	)			353,034
(Dollars in Thousands)
(Unaudited)																					Property, plant and equipment, net			60				548,794				237,304				—				786,158
																					Investment in subsidiaries and intercompany advances			780,878				(233,388	)			1,467,429				(2,014,919	)			—
		Three Months Ended September 30, 2012																			Other noncurrent assets			43,569				59,541				13,431				—				116,541
		Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
Total revenues		$	—			$	98,969			$	94,749			$	(28,417	)		$	165,301		Total assets		$	1,202,964			$	472,705			$	2,107,769			$	(2,527,705	)		$	1,255,733
Operating expenses			—				45,850				84,051				(28,417	)			101,484
Depreciation and amortization			—				17,866				11,913				—				29,779		LIABILITIES AND STOCKHOLDERS’ EQUITY
																					Current liabilities:
Total operating gross margin			—				35,253				(1,215	)			—				34,038		Current portion of long-term debt		$	10,000			$	—			$	—			$	—			$	10,000
																					Accounts payable and accrued liabilities			65,839				93,243				205,864				(227,200	)			137,746
General and administration expense(1)			(47	)			(8,823	)			(35	)			—				(8,905	)	Accrued income taxes			—				612				3,508				—				4,120
Gain on disposition of assets, net			—				553				53				—				606
																					Total current liabilities			75,839				93,855				209,372				(227,200	)			151,866
Total operating income (loss)			(47	)			26,983				(1,197	)			—				25,739
Other income and (expense):																					Long-term debt			469,205				—				—				—				469,205
Interest expense			(9,105	)			(43	)			(1,840	)			2,817				(8,171	)	Other long-term liabilities			3,933				6,129				13,120				—				23,182
Interest income			95				179				2,573				(2,817	)			30		Long-term deferred tax liability			—				36,894				(16,047	)			—				20,847
Changes in fair value of derivative positions			19				—				—				—				19		Intercompany payables			62,583				43,657				216,320				(322,560	)			—
Loss on extinguishment of debt			(117	)			—				—				—				(117	)	Contingencies			—				—				—				—				—
Other			—				26				—				—				26		Stockholders’ equity:
Equity in net earnings of subsidiaries			10,596				—				—				(10,596	)			—		Common stock			19,818				18,049				43,003				(61,052	)			19,818
																					Capital in excess of par value			646,217				733,112				1,455,246				(2,188,358	)			646,217
Total other income (expense)			1,488				162				733				(10,596	)			(8,213	)	Retained earnings (accumulated deficit)			(74,631	)			(458,991	)			187,526				271,465				(74,631	)

Income (loss) before income taxes			1,441				27,145				(464	)			(10,596	)			17,526		Total controlling interest stockholders’ equity			591,404				292,170				1,685,775				(1,977,945	)			591,404

Income tax expense (benefit)			(9,495	)			10,451				5,739				—				6,695		Noncontrolling interest			—				—				(771	)			—				(771	)

Net income (loss)			10,936				16,694				(6,203	)			(10,596	)			10,831		Total Equity			591,404				292,170				1,685,004				(1,977,945	)			590,633

Less: Net income (loss) attributable to noncontrolling interest			—				—				(105	)			—				(105	)	Total liabilities and stockholders’ equity		$	1,202,964			$	472,705			$	2,107,769			$	(2,527,705	)		$	1,255,733

Net income (loss) attributable to controlling interest		$	10,936			$	16,694			$	(6,098	)		$	(10,596	)		$	10,936		PARKER DRILLING COMPANY AND SUBSIDIARIES
																					CONSOLIDATING CONDENSED BALANCE SHEET
-1	General and administration expenses for field operations are included in operating expenses.																				(Dollars in Thousands)
PARKER DRILLING COMPANY AND SUBSIDIARIES																					(Unaudited)
CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS
(Dollars in Thousands)																							31-Dec-11
(Unaudited)																							Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
																					ASSETS
		Nine Months Ended September 30, 2013																			Current assets:
		Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated			Cash and cash equivalents		$	55,670			$	4,212			$	37,987			$	—			$	97,869
Total revenues		$	—			$	345,434			$	388,912			$	(103,428	)		$	630,918		Accounts and notes receivable, net			289,512				94,748				285,326				(485,663	)			183,923
Operating expenses			—				186,708				331,056				(103,428	)			414,336		Rig materials and supplies			—				762				29,185				—				29,947
Depreciation and amortization			—				57,335				40,339				—				97,674		Deferred costs			—				—				3,249				—				3,249
																					Deferred income taxes			—				5,311				853				486				6,650
Total operating gross margin			—				101,391				17,517				—				118,908		Other tax assets			47,834				(25,218	)			2,742				—				25,358
																					Assets held for sale			—				—				5,315				—				5,315
General and administration expense(1)			(140	)			(48,942	)			(367	)			—				(49,449	)	Other current assets			788				6,381				8,133				—				15,302
Gain on disposition of assets, net			—				1,917				842				—				2,759
																					Total current assets			393,804				86,196				372,790				(485,177	)			367,613
Total operating income (loss)			(140	)			54,366				17,992				—				72,218
Other income and (expense):																					Property, plant and equipment, net			79				474,942				244,787				1				719,809
Interest expense			(36,734	)			(167	)			(9,494	)			12,521				(33,874	)	Investment in subsidiaries and intercompany advances			720,214				(212,883	)			1,347,719				(1,855,050	)			—
Interest income			3,366				1,584				9,963				(12,521	)			2,392		Other noncurrent assets			44,962				66,660				16,839				363				128,824
Extinguishment of debt			(5,218	)			—				—				—				(5,218	)
Changes in fair value of derivative positions			54				—				—				—				54		Total assets		$	1,159,059			$	414,915			$	1,982,135			$	(2,339,863	)		$	1,216,246
Other			—				(178	)			511				—				333
Equity in net earnings of subsidiaries			36,330				—				—				(36,330	)			—		LIABILITIES AND STOCKHOLDERS’ EQUITY
																					Current liabilities:
Total other income (expense)			(2,202	)			1,239				980				(36,330	)			(36,313	)	Current portion of long-term debt		$	145,723			$	—			$	—			$	—			$	145,723
																					Accounts payable and accrued liabilities			60,120				94,056				181,010				(199,936	)			135,250
Income (loss) before income taxes			(2,342	)			55,605				18,972				(36,330	)			35,905		Accrued income taxes			(205	)			921				4,121				—				4,837

Total Income tax expense (benefit)			(19,185	)			27,993				10,033				—				18,841		Total current liabilities			205,638				94,977				185,131				(199,936	)			285,810

Net income (loss)			16,843				27,612				8,939				(36,330	)			17,064		Long-term debt			337,000				—				—				—				337,000
																					Other long-term liabilities			8,081				9,474				15,897				—				33,452
Less: Net income (loss) attributable to noncontrolling interest			—				—				221				—				221		Long-term deferred tax liability			1,151				25,232				(11,296	)			847				15,934
																					Intercompany payables			62,583				43,657				111,619				(217,859	)			—
Net income (loss) attributable to controlling interest		$	16,843			$	27,612			$	8,718			$	(36,330	)		$	16,843		Contingencies			—				—				—				—				—
																					Stockholders’ equity:
-1	General and administration expenses for field operations are included in operating expenses.																				Common stock			19,508				18,049				43,003				(61,052	)			19,508
PARKER DRILLING COMPANY AND SUBSIDIARIES																					Capital in excess of par value			637,042				733,120				1,444,091				(2,177,211	)			637,042
CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS																					Retained earnings (accumulated deficit)			(111,944	)			(509,594	)			194,246				315,348				(111,944	)
(Dollars in Thousands)
(Unaudited)																					Total controlling interest stockholders’ equity			544,606				241,575				1,681,340				(1,922,915	)			544,606

		Nine Months Ended September 30, 2012																			Noncontrolling interest			—				—				(556	)			—				(556	)
		Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
Total revenues		$	—			$	302,892			$	295,811			$	(77,908	)		$	520,795		Total Equity			544,606				241,575				1,680,784				(1,922,915	)			544,050
Operating expenses			—				136,849				242,001				(77,908	)			300,942
Depreciation and amortization			—				49,127				36,230				—				85,357		Total liabilities and stockholders’ equity		$	1,159,059			$	414,915			$	1,982,135			$	(2,339,863	)		$	1,216,246

Total operating gross margin			—				116,916				17,580				—				134,496		PARKER DRILLING COMPANY AND SUBSIDIARIES
																					CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
General and administration expense(1)			(137	)			(21,273	)			(412	)			—				(21,822	)	(Dollars in Thousands)
Gain on disposition of assets, net			—				1,168				1,298				—				2,466		(Unaudited)

Total operating income (loss)			(137	)			96,811				18,466				—				115,140				Year Ended December 31, 2012
Other income and (expense):																							Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
Interest expense			(27,923	)			(115	)			(5,811	)			8,716				(25,133	)	Cash flows from operating activities:
Interest income			8,695				4,894				39,345				(52,825	)			109		Net income (loss)		$	37,313			$	54,961			$	32,816			$	(87,992	)		$	37,098
Changes in fair value of derivative positions			8				—				—				—				8		Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Loss on extinguishment of debt			(1,766	)			—				—				—				(1,766	)	Depreciation and amortization			—				65,354				47,663				—				113,017
Other			—				64				(2	)			—				62		Loss on extinguishment of debt			2,130				—				—				—				2,130
Equity in net earnings of subsidiaries			61,553				—				—				(61,553	)			—		Gain on disposition of assets			—				(775	)			(1,199	)			—				(1,974	)
																					Deferred income tax expense			2,257				15,429				(1,849	)			—				15,837
Total other income (expense)			40,567				4,843				33,532				(105,662	)			(26,720	)	Expenses not requiring cash			16,558				33,644				(27,602	)			—				22,600
																					Equity in net earnings of subsidiaries			(43,884	)			—				—				43,884				—
Income (loss) before income taxes			40,430				101,654				51,998				(105,662	)			88,420		Change in accounts receivable			(445	)			(1,788	)			17,474				—				15,241
																					Change in other assets			1,649				2,060				(9,200	)			—				(5,491	)
Income tax expense (benefit)			(16,981	)			38,149				9,987				—				31,155		Change in accrued income taxes			(4,055	)			220				(2,267	)			—				(6,102	)
																					Change in liabilities			3,914				(4,158	)			(2,413	)			—				(2,657	)
Net income (loss)			57,411				63,505				42,011				(105,662	)			57,265
																					Net cash provided by (used in) operating activities			15,437				164,947				53,423				(44,108	)			189,699
Less: Net income (loss) attributable to noncontrolling interest			—				—				(146	)			—				(146	)
																					Cash flows from investing activities:
Net income (loss) attributable to controlling interest		$	57,411			$	63,505			$	42,157			$	(105,662	)		$	57,411		Capital expenditures			—				(176,333	)			(15,210	)			—				(191,543	)
																					Proceeds from the sale of assets			—				2,062				1,875				—				3,937
-1	General and administration expenses for field operations are included in operating expenses.																				Proceeds from insurance settlements			—				—				—				—				—
PARKER DRILLING COMPANY AND SUBSIDIARIES																					Intercompany dividend payment			(8,387	)			(4,357	)			(31,364	)			44,108				—
CONSOLIDATING CONDENSED STATEMENT OF COMPREHENSIVE INCOME (LOSS)
(Dollars in Thousands)																					Net cash (used in) investing activities			(8,387	)			(178,628	)			(44,699	)			44,108				(187,606	)
(Unaudited)
																					Cash flows from financing activities:
		Three Months Ended September 30, 2013																			Proceeds from debt issuance			130,000				—				—				—				130,000
		Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated			Proceeds from draw on revolver credit facility			7,000				—				—				—				7,000
Comprehensive income:																					Paydown on senior notes			(125,000	)			—				—				—				(125,000	)
Net income		$	7,970			$	10,817			$	11,653			$	(22,322	)		$	8,118		Paydown on term note			(18,000	)			—				—				—				(18,000	)
Other comprehensive gain, net of tax:																					Paydown on revolver credit facility			—				—				—				—				—
Currency translation difference on related borrowings			—				—				(577	)			—				(577	)	Payment of debt issuance costs			(4,859	)			—				—				—				(4,859	)
Currency translation difference on foreign currency net investments											2,098								2,098		Payment of debt extinguishment costs			(555	)			—				—				—				(555	)
																					Proceeds from stock options exercised			—				—				—				—				—
Total other comprehensive gain, net of tax:			—				—				1,521				—				1,521		Excess tax benefit from stock-based compensation			(662	)			—				—				—				(662	)
																					Intercompany advances, net			(8,393	)			20,492				(12,099	)			—				—
Comprehensive income			7,970				10,817				13,174				(22,322	)			9,639
Comprehensive (income) attributable to noncontrolling interest			—				—				(53	)			—				(53	)	Net cash provided by (used in) financing activities			(20,469	)			20,492				(12,099	)			—				(12,076	)

Comprehensive income attributable to controlling interest		$	7,970			$	10,817			$	13,121			$	(22,322	)		$	9,586		Net change in cash and cash equivalents			(13,419	)			6,811				(3,375	)			—				(9,983	)
																					Cash and cash equivalents at beginning of year			55,670				4,212				37,987				—				97,869
PARKER DRILLING COMPANY AND SUBSIDIARIES
CONSOLIDATING CONDENSED STATEMENT OF COMPREHENSIVE INCOME (LOSS)																					Cash and cash equivalents at end of year		$	42,251			$	11,023			$	34,612			$	—			$	87,886
(Dollars in Thousands)
(Unaudited)																					See accompanying notes to unaudited consolidated condensed financial statements.
																					PARKER DRILLING COMPANY AND SUBSIDIARIES
		Nine Months Ended September 30, 2013																			CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
		Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated			(Dollars in Thousands)
Comprehensive income:																					(Unaudited)
Net income		$	16,843			$	27,612			$	8,939			$	(36,330	)		$	17,064
Other comprehensive gain, net of tax:																							Year Ended December 31, 2011
Currency translation difference on related borrowings			—				—				(1,542	)			—				(1,542	)			Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
Currency translation difference on foreign currency net investments											2,499								2,499		Cash flows from operating activities:
																					Net income (loss)		$	(50,451	)		$	(49,106	)		$	25,428			$	23,484			$	(50,645	)
Total other comprehensive gain, net of tax:			—				—				957				—				957		Adjustments to reconcile net income (loss)to net cash provided by operating activities:
																					Depreciation and amortization			—				62,744				49,392				—				112,136
Comprehensive income			16,843				27,612				9,896				(36,330	)			18,021		Loss on extinguishment of debt			—				—				—				—				—
Comprehensive (income) attributable to noncontrolling interest			—				—				(83	)			—				(83	)	Gain on disposition of assets			—				(2,706	)			(953	)			—				(3,659	)
																					Deferred income tax expense			31,518				(57,030	)			(22,863	)			—				(48,375	)
Comprehensive income attributable to controlling interest		$	16,843			$	27,612			$	9,813			$	(36,330	)		$	17,938		Impairment and other charges			—				170,000				—				—				170,000
																					Provision for reduction in carrying value of certain assets			—				1,350				—				—				1,350
PARKER DRILLING COMPANY AND SUBSIDIARIES																					Expenses not requiring cash			16,411				376				(3,954	)			—				12,833
CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS																					Equity in net earnings of subsidiaries			23,484				—				—				(23,484	)			—
(Dollars in Thousands)																					Change in accounts receivable			(288,333	)			347,344				(65,852	)			—				(6,841	)
(Unaudited)																					Change in other assets			62,173				(16,724	)			16,404				—				61,853
																					Change in liabilities			(10,454	)			(53,404	)			41,091				—				(22,767	)
		Nine Months Ended September 30, 2013
		Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated			Net cash provided by (used in) operating activities			(215,652	)			402,844				38,693				—				225,885
Cash flows from operating activities:
Net income (loss)		$	16,843			$	27,612			$	8,939			$	(36,330	)		$	17,064		Cash flows from investing activities:
Adjustments to reconcile net income (loss):																					Capital expenditures			—				(174,999	)			(15,400	)			—				(190,399	)
Depreciation and amortization			—				57,335				40,339				—				97,674		Proceeds from the sale of assets			—				4,335				1,200				—				5,535
Loss on extinguishment of debt			5,218				—				—				—				5,218		Proceeds from insurance settlements			—				250				—				—				250
Gain on disposition of assets			—				(1,917	)			(842	)			—				(2,759	)	Intercompany dividend payment			—				—				—				—				—
Deferred income tax expense			(2,860	)			10,479				5,253				—				12,872
Expenses not requiring cash			10,494				591				(1,157	)			—				9,928		Net cash provided by (used in) investing activities			—				(170,414	)			(14,200	)			—				(184,614	)
Equity in net earnings of subsidiaries			(36,330	)			—				—				36,330				—
Change in accounts receivable			(899	)			(7,951	)			(19,755	)			—				(28,605	)	Cash flows from financing activities:
Change in accrued income taxes			358				(85	)			2,604				—				2,877		Proceeds from debt issuance			50,000				—				—				—				50,000
Change in other assets			3,045				4,580				(8,971	)			—				(1,346	)	Proceeds from draw on revolver credit facility			—				—				—				—				—
Change in liabilities			14,222				(2,116	)			306				—				12,412		Paydown on senior notes			—				—				—				—				—
																					Paydown on term note			(21,000	)			—				—				—				(21,000	)
Net cash provided by (used in) operating activities			10,091				88,528				26,716				—				125,335		Paydown on revolver credit facility			(25,000	)			—				—				—				(25,000	)
																					Payment of debt issuance costs			(504	)			—				—				—				(504	)
Cash flows from investing activities:																					Payment of debt extinguishment costs			—				—				—				—				—
Capital expenditures			—				(66,956	)			(35,900	)			—				(102,856	)	Proceeds from stock options exercised			183				—				—				—				183
Proceeds from the sale of assets			—				2,751				2,782				—				5,533		Excess tax benefit from stock-based compensation			1,488				—				—				—				1,488
Acquisition of ITS, net of cash acquired			—				(292	)			(117,699	)			—				(117,991	)	Intercompany advances, net			252,320				(230,535	)			(21,785	)			—				—

Net cash (used in) investing activities			—				(64,497	)			(150,817	)			—				(215,314	)	Net cash provided by (used in) financing activities			257,487				(230,535	)			(21,785	)			—				5,167

Cash flows from financing activities:																					Net change in cash and cash equivalents			41,835				1,895				2,708				—				46,438
Proceeds from debt issuance			350,000				—				—				—				350,000		Cash and cash equivalents at beginning of year			13,835				2,317				35,279				—				51,431
Repayments of long term debt			(125,000	)			—				—				—				(125,000	)
Paydown on term note			(50,000	)			—				—				—				(50,000	)	Cash and cash equivalents at end of year		$	55,670			$	4,212			$	37,987			$	—			$	97,869
Payment of debt issuance costs			(10,981	)			—				—				—				(10,981	)
Excess tax benefit from stock-based compensation			531				—				—				—				531		See accompanying notes to unaudited consolidated condensed financial statements.
Intercompany advances, net			(127,376	)			(13,781	)			141,157				—				—		PARKER DRILLING COMPANY AND SUBSIDIARIES
																					CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
Net cash provided by (used in) financing activities			37,174				(13,781	)			141,157				—				164,550		(Dollars in Thousands)
																					(Unaudited)
Net change in cash and cash equivalents			47,265				10,250				17,056				—				74,571
Cash and cash equivalents at beginning of year			42,251				11,023				34,612				—				87,886				Year Ended December 31, 2010
																							Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
Cash and cash equivalents at end of year		$	89,516			$	21,273			$	51,668			$	—			$	162,457		Cash flows from operating activities:
																					Net income (loss)		$	(14,461	)		$	(1,046	)		$	(12,163	)		$	12,962			$	(14,708	)
PARKER DRILLING COMPANY AND SUBSIDIARIES																					Adjustments to reconcile net income (loss) to net cash provided by operating activities:
CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS																					Depreciation and amortization			—				63,402				51,628				—				115,030
(Dollars in Thousands)																					Loss on extinguishment of debt			7,209				—				—				—				7,209
(Unaudited)																					Gain on disposition of assets			—				(2,067	)			(2,553	)			—				(4,620	)
																					Deferred income tax expense			(4,845	)			2,323				1,214				—				(1,308	)
		Nine Months Ended September 30, 2012																			Provision for reduction in carrying value of certain assets			—				1,952				—				—				1,952
		Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated			Expenses not requiring cash			14,829				—				—				—				14,829
Cash flows from operating activities:																					Equity in net earnings of subsidiaries			22,962				—				—				(22,962	)			—
Net income (loss)		$	57,411			$	63,505			$	42,011			$	(105,662	)		$	57,265		Change in accounts receivable			16,178				(14,763	)			19,337				—				20,752
Adjustments to reconcile net income (loss)to net cash provided by operating activities:																					Change in other assets			(2,505	)			(13,454	)			15,365				—				(594	)
Depreciation and amortization			—				49,127				36,230				—				85,357		Change in liabilities			(144	)			7,793				(22,641	)			—				(14,992	)
Loss on extinguishment of debt			1,766				—				—				—				1,766
Gain on disposition of assets			—				(1,168	)			(1,298	)			—				(2,466	)	Net cash provided by (used in) operating activities			39,223				44,140				50,187				(10,000	)			123,550
Deferred income tax expense			5,940				4,868				(2,405	)			—				8,403
Expenses not requiring cash			13,264				689				1,770				1				15,724		Cash flows from investing activities:
Equity in net earnings of subsidiaries			(61,553	)			—				—				61,553				—		Capital expenditures			—				(169,784	)			(49,400	)			—				(219,184	)
Change in accounts receivable			(291	)			766				24,173				—				24,648		Proceeds from the sale of assets			—				4,646				1,829				—				6,475
Change in other assets			(32,874	)			61,320				(27,882	)			—				564		Intercompany dividend payment			—				—				(10,000	)			10,000				—
Change in accrued income taxes			(5,068	)			1,832				187				—				(3,049	)
Change in liabilities			12,917				(21,430	)			(1,672	)			—				(10,185	)	Net cash provided by (used in) investing activities			—				(165,138	)			(57,571	)			10,000				(212,709	)

Net cash provided by (used in) operating activities			(8,488	)			159,509				71,114				(44,108	)			178,027		Cash flows from financing activities:
																					Proceeds from debt issuance			300,000				—				—				—				300,000
Cash flows from investing activities:																					Proceeds from draw on revolver credit facility			25,000				—				—				—				25,000
Capital expenditures			—				(139,618	)			(8,040	)			—				(147,658	)	Paydown on senior notes			(225,000	)			—				—				—				(225,000	)
Proceeds from the sale of assets			—				1,667				1,829				—				3,496		Paydown on term note			(12,000	)			—				—				—				(12,000	)
Intercompany dividend payment			(8,387	)			(4,357	)			(31,364	)			44,108				—		Paydown on revolver credit facility			(42,000	)			—				—				—				(42,000	)
																					Payment of debt issuance costs			(7,976	)			—				—				—				(7,976	)
Net cash (used in) investing activities			(8,387	)			(142,308	)			(37,575	)			44,108				(144,162	)	Payment of debt extinguishment costs			(7,466	)			—				—				—				(7,466	)
																					Proceeds from stock options exercised			26				—				—				—				26
Cash flows from financing activities:																					Excess tax benefit from stock-based compensation			1,203				—				—				—				1,203
Proceeds from debt issuance			130,000				—				—				—				130,000		Intercompany advances, net			(115,364	)			121,547				(6,183	)			—				—
Repayments of senior notes			(125,000	)			—				—				—				(125,000	)
Paydown on term note			(18,000	)			—				—				—				(18,000	)	Net cash provided by (used in) financing activities			(83,577	)			121,547				(6,183	)			—				31,787
Payment of debt issuance costs			(3,516	)			—				—				—				(3,516	)
Payment of debt extinguishment costs			(519	)			—				—				—				(519	)	Net change in cash and cash equivalents			(44,354	)			549				(13,567	)			—				(57,372	)
Excess tax benefit from stock-based compensation			(572	)			—				—				—				(572	)	Cash and cash equivalents at beginning of year			58,189				1,768				48,846				—				108,803
Intercompany advances, net			56,280				(13,507	)			(42,773	)			—				—
																					Cash and cash equivalents at end of year		$	13,835			$	2,317			$	35,279			$	—			$	51,431
Net cash provided by (used in) financing activities			38,673				(13,507	)			(42,773	)			—				(17,607	)

Net change in cash and cash equivalents			21,798				3,694				(9,234	)			—				16,258
Cash and cash equivalents at beginning of year			55,670				4,212				37,987				—				97,869

Cash and cash equivalents at end of year		$	77,468			$	7,906			$	28,753			$	—			$	114,127

Selected_Quarterly_Financial_D

Selected Quarterly Financial Data	12 Months Ended
Selected Quarterly Financial Data	Dec. 31, 2012
Selected Quarterly Financial Data	'
	Note 17 — Selected Quarterly Financial Data


			Quarter
	Year 2012		First		Second		Third		Fourth			Total
			(Dollars in Thousands Except Per Share Amounts)
			(Unaudited)
	Revenues		$	176,569	$	178,925	$	165,301	$	157,187		$	677,982
	Operating gross margin(2)		$	54,018	$	46,440	$	34,038	$	16,405		$	150,901
	Operating income		$	49,013	$	40,388	$	25,739	$	(8,317	)	$	106,823
	Net income (loss) attributable to controlling interest		$	26,392	$	20,083	$	10,936	$	(20,098	)	$	37,313
	Basic earnings per share — net income (loss)(1)		$	0.23	$	0.17	$	0.09	$	(0.17	)	$	0.32
	Diluted earnings per share — net income (loss)(1)		$	0.22	$	0.17	$	0.09	$	(0.17	)	$	0.31

			Quarter
	Year 2011		First		Second		Third		Fourth			Total
			(Dollars in Thousands Except Per Share Amounts)
			(Unaudited)
	Revenues		$	156,179	$	172,812	$	176,589	$	181,066		$	686,646
	Operating gross margin(2)		$	21,204	$	40,797	$	49,966	$	44,399		$	156,366
	Operating income		$	15,402	$	33,215	$	41,959	$	(133,215	)	$	(42,639	)
	Net income (loss) attributable to controlling interest		$	4,827	$	14,173	$	20,725	$	(90,176	)	$	(50,451	)
	Basic earnings per share — net income (loss)(1)		$	0.04	$	0.12	$	0.18	$	(0.77	)	$	(0.43	)
	Diluted earnings per share — net income (loss)(1)		$	0.04	$	0.12	$	0.18	$	(0.77	)	$	(0.43	)

	1)	As a result of shares issued during the year, earnings per share for each of the year’s four quarters, which are based on weighted average shares outstanding during each quarter, may not equal the annual earnings per share, which is based on the weighted average shares outstanding during the year. Additionally, as a result of rounding to the thousands, revenues, operating gross margin, operating income, and net income (loss) attributable to controlling interest may not equal the 2012 year to date results.
	2)	As the Company modified our reporting segments to be consistent with recent organizational changes to improve our drilling organization, expenses related to our U.S. Barge Drilling segment were found to be incorrectly included in our general and administrative expense during the first through third quarters of the current year. These expenses have been appropriately reclassified to be included as part of the segment operating expenses, therefore our operating gross margin for each of the first three quarters will not agree to the respective 10-Q reports for the current year only.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	9 Months Ended		12 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Recent Accounting Pronouncements	'		'
	13	Recent Accounting Pronouncements	Note 18 — Recent Accounting Pronouncements
	Effective January 1, 2012, we adopted the accounting standards update that changes the wording used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. Some of the amendments included in this update are intended to clarify the applications of existing fair value measurement requirements. The update was effective for annual periods beginning after December 15, 2011. Our adoption did not have a material effect on the disclosures contained in our notes to the consolidated financial statements.		Revenue Recognition — On January 1, 2011, we adopted an update issued by the Financial Accounting Standards Board (FASB) to existing guidance on revenue recognition for arrangements with multiple deliverables. This update allows companies to allocate consideration for qualified separate deliverables using estimated selling price for both delivered and undelivered items when vendor-specific objective evidence or third-party evidence is unavailable. It also requires additional disclosures on the nature of multiple element arrangements, the types of deliverables under the arrangements, the general timing of their delivery, and significant factors and estimates used to determine estimated selling prices. The update is effective for fiscal years beginning after June 15, 2010. The adoption of this update did not have a material impact on our financial position, results of operations, cash flows, or disclosures.
	In July 2012, the FASB issued an update to existing guidance on the impairment assessment of indefinite-lived intangibles. This update simplifies the impairment assessment of indefinite-lived intangibles by allowing companies to consider qualitative factors to determine whether it is more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount before performing the two step impairment review process. The adoption of this update did not have an impact on our condensed consolidated financial statements.		Comprehensive Income — In June 2011, the FASB issued Accounting Standards Update 2011-05, “Presentation of Comprehensive Income.” This update will increase the prominence of comprehensive income in the financial statements. It gives an entity the option to present the components of net income and comprehensive income in either a single continuous statement or in two separate but consecutive financial statements and eliminates the option to present other comprehensive income in the statement of changes in equity. This update will be effective for us beginning in the first quarter of 2012. This update did not have a material impact on our financial position, results of operations, cash flows, or disclosures.
	In February 2013, the FASB issued ASU 2013-02, Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, which requires that companies present, either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified from each component of accumulated other comprehensive income based on its source and the income statement line items affected by the reclassification. This accounting guidance is effective for our first quarter in fiscal 2014 and is only expected to impact the presentation of our consolidated financial statements and related notes.
	In July 2013, the FASB issued an update to existing guidance on presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. This ASU requires an entity to present an unrecognized tax benefit as a reduction of a deferred tax asset for a net operating loss (NOL) carryforward, or similar tax loss or tax credit carryforward, rather than as a liability when (1) the uncertain tax position would reduce the NOL or other carryforward under the tax law of the applicable jurisdiction and (2) the entity intends to use the deferred tax asset for that purpose. The ASU does not require new recurring disclosures. It is effective prospectively for our first quarter in fiscal 2014. We do not expect the adoption of this update to have an impact on our condensed consolidated financial statements.		Fair value measurements — Effective January 1, 2012, we adopted the accounting standards update that changes the wording used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. Some of the amendments included in this update are intended to clarify the applications of existing fair value measurement requirements. The update is effective for annual periods beginning after December 15, 2011. This adoption did not have a material effect on the disclosures contained in our notes to the consolidated financial statements.
			Comprehensive Income — On January 1, 2012, we adopted an update issued by the FASB to existing guidance on the presentation of comprehensive income. The update eliminates the option to present the components of other comprehensive income (OCI) as part of the statement of changes in stockholders’ equity. Public entities are required to comply with the new reporting requirements for fiscal years beginning after December 15, 2011 and interim periods within those years. Calendar year-end companies must adopt the requirements for the quarter ended March 31, 2012. The adoption of this update did not have a material impact on our financial position, results of operations, cash flows, or disclosures.
			Impairment — In July 2012, the Financial Accounting Standards Board (FASB) issued an update to existing guidance on the impairment assessment of indefinite-lived intangibles. This update simplifies the impairment assessment of indefinite-lived intangibles by allowing companies to consider qualitative factors to determine whether it is more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount before performing the two step impairment review process. The adoption of this update did not have an impact on our condensed consolidated financial statements.

Subsequent_Events

Subsequent Events	9 Months Ended		12 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Subsequent Events	'		'
	15	Subsequent Events	Note 19 — Subsequent Events
	On November 4, 2013 we announced that Robert “Bobby” L. Parker Jr., Parker Drilling Executive Chairman, will retire as an employee of the Company, effective December 31, 2013. Mr. Parker will continue to serve as Chairman of the Company’s board of directors until the annual meeting of stockholders to be held in 2014, at which time Gary G. Rich, the Company’s chief executive officer, will be nominated to serve in that role and Mr. Parker will be nominated to stand for re-election to the board for an additional three-year term.		Executive Departure
			On February 11, 2013, we announced the departure of W. Kirk Brassfield, senior vice president and chief financial officer to be effective April 30, 2013. Mr. Brassfield will assist the Company in identifying his successor and will continue his duties as senior vice president and chief financial officer during a transition period extending through April 30, 2013, unless his successor is identified and the transition period is completed before that date.

General

General	9 Months Ended
	Sep. 30, 2013
General	'
	1	General
	In the opinion of the management of Parker Drilling Company (Parker Drilling, or the Company), the accompanying unaudited consolidated condensed financial statements reflect all adjustments normally recurring which we believe are necessary for a fair presentation of: (1) Parker Drilling’s financial position as of September 30, 2013 and December 31, 2012, (2) Parker Drilling’s results of operations for the three and nine month periods ended September 30, 2013 and 2012, (3) Parker Drilling’s consolidated condensed statement of comprehensive income for the three and nine month periods ended September 30, 2013 and 2012, and (4) Parker Drilling’s cash flows for the nine month periods ended September 30, 2013 and 2012. Results for the nine month period ended September 30, 2013 are not necessarily indicative of the results that will be realized for the year ending December 31, 2013. The financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2012.
	Nature of Operations — Parker Drilling, together with its subsidiaries (the Company or Parker), is a rental tools and drilling services provider. We have operated in over 50 foreign countries and the United States since beginning operations in 1934, making us among the most geographically experienced rental tools providers and drilling contractors in the world. During 2012, we operated in 12 countries, and in 2013, we acquired an international rental tools business with operations in 10 additional countries. We have extensive experience and expertise drilling geologically difficult wells and managing the logistical and technological challenges of operating in remote, harsh and ecologically sensitive areas. We believe we are industry leaders in quality, health, safety and environmental practices. We own and operate our own drilling rigs as well as perform drilling-related services for operators who own drilling rigs and who choose to utilize our drilling experience and technical expertise on a contracted basis, typically referred to as Operations & Maintenance (O&M) work. We also provide other project management services (e.g., labor, maintenance, and logistics).
	Our rental tools business specializes in providing high-quality, reliable equipment and services for oil and natural gas drilling, workover and production applications. This includes drill pipe, heavy-weight drill pipe, tubing, high-torque connections, blow-out preventers (BOPs), drill collars, casing running systems, fishing services and more. On April 22, 2013, we acquired International Tubular Services Limited and certain of its affiliates (collectively, ITS) and other related assets (the ITS Acquisition — see also Note 2). ITS’s principal activities include the rental of drilling equipment and pressure control systems, provision of casing running systems and fishing services, together with machine shop support. ITS serves an extensive customer base of exploration and production (E&P) companies, drilling contractors and service companies from 21 operating facilities primarily located in the Middle East, Latin America, U.K. and Europe, and the Asia-Pacific regions.
	Within our U.S. drilling business we operate barge rigs that drill for natural gas, oil, and a combination of oil and natural gas in the shallow waters in and along the inland waterways of Louisiana, Alabama, and Texas. Additionally in our U.S. drilling business, we have two Arctic-class rigs operating on the North Slope of Alaska and one O&M contract for offshore platform operations located in California. Our international drilling business includes operations related to Parker-owned and operated rigs as well as customer-owned rigs. We strive to deploy our fleet of Parker-owned rigs in markets where we expect to have opportunities to keep the rigs in service consistently. As of September 30, 2013, our marketable rig fleet consisted of 13 barge drilling rigs and 23 land rigs located in the United States, Latin America and the Eastern Hemisphere regions. We have 5 rigs held for sale or currently not marketed as of September 30, 2013. Our Technical Services business is our engineering expertise center, which provides services to our customers as well as to our ongoing drilling business. Services provided include engineering and related project services during the concept development, pre-FEED (Front End Engineering Design), and FEED phases of our customer owned drilling facility projects.

	Consolidation — The consolidated condensed financial statements include the accounts of Parker Drilling and subsidiaries over which we exercise control or have a controlling financial interest, including entities, if any, in which the Company is allocated a majority of the entity’s losses or returns, regardless of ownership percentage. If a subsidiary of Parker Drilling has a 50 percent interest in an entity but Parker Drilling’s interest in the subsidiary or the entity does not meet the consolidation criteria described above, then that interest is accounted for under the equity method.
	Noncontrolling Interest — We apply the accounting standards related to noncontrolling interests for ownership interests in our subsidiaries held by parties other than Parker Drilling. The entities that comprise the noncontrolling interest include Parker SMNG Drilling Limited Liability Company, Primorsky Drill Rig Services B.V., ITS Arabia Limited, and International Tubular Services — Egypt SAE. We report noncontrolling interest as equity on the consolidated balance sheets and report net income (loss) attributable to controlling interest and to noncontrolling interest separately on the consolidated statements of operations.
	Reclassifications — Certain reclassifications have been made to prior period amounts to conform to the current period presentation. These reclassifications did not have a material effect on our consolidated condensed statements of operations, consolidated condensed balance sheets, condensed statement of comprehensive income or consolidated condensed statements of cash flows.
	Use of Estimates — The preparation of financial statements in accordance with accounting policies generally accepted in the United States (U.S. GAAP) requires us to make estimates and assumptions that affect our reported amounts of assets and liabilities, our disclosure of contingent assets and liabilities at the date of the financial statements, and our revenue and expenses during the periods reported. Estimates are typically used when accounting for certain significant items, such as allowance for doubtful accounts, legal or contractual liability accruals, mobilization and deferred mobilization, revenue and cost accounting for projects that follow the percentage of completion method, self-insured medical/dental plans, income taxes and valuation allowance, and other items requiring the use of estimates. Estimates are based on a number of variables which may include third party valuations, historical experience and assumptions that we believe are reasonable under the circumstances. Due to the inherent uncertainty involved with estimates, actual results may differ from management estimates.
	Acquisitions-purchase price allocation — We allocate the purchase price of an acquired business to its identifiable assets and liabilities based on estimated fair values at the transaction date. Transaction and integration costs associated with an acquisition are expensed as incurred. The excess of the purchase price over the amount allocated to the assets and liabilities, if any, is recorded as goodwill. We use all available information to estimate fair values, including quoted market prices, the carrying value of acquired assets, and widely accepted valuation techniques such as discounted cash flows. We engage third-party appraisal firms to assist in fair value determination of inventories, identifiable intangible assets, and any other significant assets or liabilities when appropriate. The judgments made in determining the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can materially impact our results of operations.
	Intangible Assets — Upon the ITS Acquisition, we recorded $10.0 million and $0.2 million, respectively, to recognize the fair values of definite and indefinite lived intangible assets (see Note 2 — Acquisition of ITS ). Definite lived intangible assets recorded in connection with the ITS Acquisition primarily relate to trade names, customer relationships, and developed technology and will be amortized over a weighted average period of approximately 3 years. With regard to indefinite lived intangible assets, which relate to our development of technology, we will conduct impairment tests annually, or more frequently, if events or changes in circumstances indicate that the asset might be impaired.
	Revenue Recognition — Revenues from rental activities are recognized ratably over the rental term, which is generally less than six months. Contract drilling revenues and expenses, comprised of daywork drilling contracts and engineering and related project service contracts, are recognized as services are performed and collection is reasonably assured. For certain contracts, we receive payments contractually designated for the mobilization of rigs and other drilling equipment. Mobilization payments received, and direct costs incurred for the mobilization, are deferred and recognized over the term of the related drilling contract; however, costs incurred to relocate rigs and other drilling equipment to areas in which a contract has not been secured are expensed as incurred. Reimbursements received for out-of-pocket expenses are recorded as both revenues and direct costs. For contracts that are terminated prior to the specified term, early termination payments received by us are recognized as revenues when all contractual requirements are met.
	Reimbursable Costs — Within certain contractual arrangements, we may procure, take title and risk of loss for certain equipment, or make certain expenditures on behalf of our customers. We typically receive fees for these services, which we record as revenues. We recognize reimbursements received for out-of-pocket expenditures as revenues and account for out-of-pocket expenditures as direct operating costs. Such amounts totaled $16.2 million and $12.1 million during the third quarters of 2013 and 2012, respectively and $46.5 million and $29.8 million for the nine months ended September 30, 2013 and 2012, respectively.
	Concentrations of Credit Risk — Financial instruments, which potentially subject us to concentrations of credit risk, consist primarily of trade receivables. We generally do not require collateral on our trade receivables.
	At September 30, 2013 and December 31, 2012, we had deposits in domestic banks in excess of federally insured limits of approximately $117.1 million and $12.2 million, respectively. The increase is primarily because as of January 1, 2013, all regular checking account deposits are only guaranteed up to $250,000 at each institution while prior to January 1, 2013, all regular checking account deposits were guaranteed, except investments. In addition, as of September 30, 2013 and December 31, 2012, we had uninsured deposits in foreign banks of $51.8 million and $34.5 million, respectively.
	Our customer base consists primarily of major, independent, national and international oil and gas companies and integrated service providers. We depend on a limited number of customers. Our largest customer, Exxon Neftegas Limited, constituted 14.3% of our total year-to-date revenues as of September 30, 2013. Each of our segments depends on a limited number of key customers and the loss of any one or more key customers could have a material adverse effect on a segment.
	Capitalized Interest — Interest from external borrowings is capitalized on major projects until the assets are ready for their intended use. Capitalized interest is added to the cost of the underlying assets and is amortized over the useful lives of the assets in the same manner as the underlying assets. Capitalized interest reduces net interest expense in the consolidated condensed statements of operations. During the three and nine months ended September 30, 2013, we capitalized interest costs of $0.7 million and $1.7 million, respectively, which were primarily related to a new enterprise resource planning system. During the three and nine months ended September 30, 2012 we capitalized $2.5 million and $7.9 million, respectively, of interest costs primarily related to the two Arctic-class rigs in Alaska.

Acquisition_of_ITS

Acquisition of ITS	9 Months Ended
Acquisition of ITS	Sep. 30, 2013
Acquisition of ITS	'
	2	Acquisition of ITS
	On April 22, 2013 we acquired International Tubular Services Limited and certain of its affiliates (collectively, ITS) and other related assets (the ITS Acquisition) for an initial purchase price of $101.0 million paid at the closing of the ITS Acquisition. An additional $24.0 million was deposited into an escrow account, which will either be paid to the seller or to us, as the case may be, in accordance with the Agreement. The ITS Acquisition closed simultaneously with the execution of the agreement on April 22, 2013.

	Fair value of Consideration Transferred
	The following details the fair value of the consideration transferred to effect the ITS Acquisition (dollars in thousands).


	Cash paid to, or on behalf of, ITS and its equity holders		$	101,000
	Cash deposited in escrow			19,000
	Fair value of contingent consideration deposited in escrow for assets not acquired(1)			5,000

	Total fair value of the consideration transferred		$	125,000


		-1	Based on the terms of the Agreement, $5.0 million of the $24.0 million in escrow to be paid to the seller is contingent upon certain future liabilities that could become due by ITS in certain jurisdictions. Any payments in relation to these liabilities will be deducted from the $5.0 million escrow amount and the net balance of the escrow will be paid to the seller. We estimate that the entire $5.0 million in escrow will be paid to the seller, and therefore, the estimated fair value of the consideration in escrow related to these liabilities is $5.0 million. We do not expect to receive any amount back from escrow, and therefore did not record a receivable from the escrow. Any changes to the fair value of the contingent consideration in the future of less than $5.0 million will result in recording a receivable from escrow. The receivable will be recorded at fair value. As of September 30, 2013, the fair value of the receivable is $0.0 million.
	Preliminary Allocation of Consideration Transferred to Net Assets Acquired
	The following amounts represent the preliminary estimates of fair value of identifiable assets acquired and liabilities assumed in the ITS Acquisition and are based on management’s estimates, judgments and assumptions. These estimates, judgments and assumptions are subject to change upon final valuation and should be treated as preliminary values. Management estimated that the fair value of the net assets acquired less noncontrolling interest equals consideration paid. Therefore, there was no goodwill recorded.

	The final allocation of consideration will include changes in (1) amounts deposited in escrow, (2) estimated fair values of property and equipment, (3) allocations to intangible assets and liabilities, (4) changes in contingent consideration, and (5) other assets and liabilities. These amounts will be finalized as soon as possible, but no later than one year from the acquisition date.


			April 22, 2013
			(In thousands)
	Cash and cash equivalents		$	7,009
	Accounts and notes receivable, net(1)			48,795
	Other current assets			1,803
	Accounts payable and accrued liabilities			(39,156	)
	Accrued income taxes			(1,251	)

	Working capital excluding rig materials and supplies			17,200
	Rig materials and supplies			11,514
	Property, plant and equipment, net(2)			70,339
	Investment in joint venture			4,134
	Other noncurrent assets			2,818

	Total tangible assets			106,005
	Deferred income tax assets — current			222
	Deferred income tax assets — noncurrent(3)			14,153
	Intangible assets(4)
	Trade name, developed technology, and customer relationship			10,000
	Indefinite-lived intangible assets			200

	Total assets acquired			130,580

	Other long-term liabilities			(211	)
	Long-term deferred tax liability			(2,661	)

	Net assets acquired			127,708
	Less: Noncontrolling interest(5)			(2,708	)

	Total consideration transferred		$	125,000


		-1	Gross contractual amounts receivable totaled $54.7 million as of the acquisition date.
		-2	We recorded an adjustment of $43.7 million to reduce the historical carrying value of the acquired property, plant and equipment to its estimated fair value.
		-3	In connection with the ITS Acquisition, we recorded a $7.7 million adjustment to increase deferred income tax assets primarily related to the differences between acquisition date estimated fair value and tax basis of acquired property, plant and equipment.
		-4	We recorded $10.0 million and $0.2 million to reflect the estimated fair values of definite and indefinite lived intangible assets, respectively, recognized in connection with the ITS Acquisition. Our depreciation and amortization expense will reflect this valuation adjustment as the definite lived intangible assets are amortized in future periods. Definite lived intangible assets recorded in connection with the ITS Acquisition, which primarily relate to trade names, customer relationships, and developed technology will be amortized over a weighted average period of approximately 3.4 years.
		-5	We recorded an adjustment of $1.0 million to write-down the noncontrolling interest to its estimated fair value. The estimated fair value of the noncontrolling interest was calculated as a percentage of the net assets acquired related to certain subsidiaries in which ITS holds less than a 100 percent controlling interest. The fair value of the net assets of these subsidiaries was primarily based on the income approach valuation model.
	Acquisition Related Costs
	Acquisition-related transaction costs consisted of various advisory, compliance, legal, accounting, valuation and other professional or consulting fees totaling $4.8 million and $19.2 million for the three and nine month periods ended September 30, 2013, respectively, and were expensed as incurred and included in general and administrative expense on our condensed consolidated statement of operations. Debt issuance costs of $5.4 million associated with our $125 million term loan, fully funded by Goldman Sachs Bank USA as Sole Lead Arranger and Administrative Agent (the Goldman Term Loan) issued on April 18, 2013 were deferred to be amortized to interest expense over the life of the term loan. However, the Goldman Term Loan was repaid on July 30, 2013 with net proceeds from the issuance of $225.0 million aggregate principal amount of 7.5% Senior Notes due August 1, 2020 (see Note 9 — Long-Term Debt, for further discussion), and the unamortized deferred costs of $5.2 million were expensed during the third quarter of 2013.
	Supplemental Pro forma Results
	ITS’ results of operations have been included in our financial statements for periods subsequent to April 22, 2013, the effective date of the ITS Acquisition. ITS contributed revenues of $58.5 million and net income of approximately $4.4 million to Parker Drilling for the period from the closing of the ITS Acquisition ( April 22, 2013 ) through September 30, 2013.
	The following unaudited supplemental pro forma results present consolidated information for the nine months ended September 30, 2013 as if the ITS Acquisition had been completed on January 1, 2012. The pro forma results have been calculated after applying our accounting policies and include, among others, (i) the amortization associated with the fair value of the acquired intangible assets, (ii) interest expense associated with the Goldman Term Loan and (iii) the impact of certain fair value adjustments such as a decrease in depreciation expense related to the write-down in property, plant and equipment. The pro forma results do not include any potential synergies, non-recurring charges which result directly from the ITS Acquisition, cost savings or other expected benefits of the ITS Acquisition. The pro forma financial information does not necessarily represent what would have occurred if the transaction had taken place at the beginning of the period presented and should not be taken as representative of our future consolidated results of operations. We have not concluded our integration work. Accordingly, this pro forma information does not include all costs related to the integration nor the benefits we expect to realize from operating synergies.


		Nine Months Ended September 30,
		2013				2012
		(Dollars in thousands, except per share data)
Revenue		$	671,738			$	614,679
Net income		$	33,081			$	54,927
Net income attributable to Parker Drilling		$	32,629			$	55,073
Earnings per share — basic		$	0.27			$	0.47
Earnings per share — diluted		$	0.27			$	0.46

Basic number of shares			119,443,260				117,458,365
Diluted number of shares			121,693,781				118,810,195

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	9 Months Ended
Accumulated Other Comprehensive Income	Sep. 30, 2013
Accumulated Other Comprehensive Income	'
	4	Accumulated Other Comprehensive Income
	Accumulated other comprehensive loss consisted of the following:


			Foreign Currency Items
			(in thousands)
	December 31, 2012		$	—
	Current period other comprehensive income			957

	September 30, 2013		$	957

	No amounts were reclassified out of accumulated other comprehensive income for the nine months ended September 30, 2013.

Accounting_for_Uncertainty_in_

Accounting for Uncertainty in Income Taxes	9 Months Ended
	Sep. 30, 2013
Accounting for Uncertainty in Income Taxes	'
	7	Accounting for Uncertainty in Income Taxes
	We apply the accounting guidance related to accounting for uncertainty in income taxes. This guidance prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more likely than not to be sustained upon examination by taxing authorities. At September 30, 2013, we had a liability for unrecognized tax benefits of $10.5 million (which includes $3.8 million of benefits which would favorably impact our effective tax rate upon recognition) primarily related to foreign operations. As of September 30, 2012, we had a liability for unrecognized tax benefits of $12.0 million ( $5.2 million of which, if recognized, would favorably impact our effective tax rate). In addition, we recognize interest and penalties that could be applied to uncertain tax positions in periodic income tax expense. As of September 30, 2013 and December 31, 2012, we had approximately $7.7 million and $7.0 million, respectively, of accrued interest and penalties related to uncertain tax positions.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Nature of Operations	'	'
	Nature of Operations — Parker Drilling, together with its subsidiaries (the Company or Parker), is a rental tools and drilling services provider. We have operated in over 50 foreign countries and the United States since beginning operations in 1934, making us among the most geographically experienced rental tools providers and drilling contractors in the world. During 2012, we operated in 12 countries, and in 2013, we acquired an international rental tools business with operations in 10 additional countries. We have extensive experience and expertise drilling geologically difficult wells and managing the logistical and technological challenges of operating in remote, harsh and ecologically sensitive areas. We believe we are industry leaders in quality, health, safety and environmental practices. We own and operate our own drilling rigs as well as perform drilling-related services for operators who own drilling rigs and who choose to utilize our drilling experience and technical expertise on a contracted basis, typically referred to as Operations & Maintenance (O&M) work. We also provide other project management services (e.g., labor, maintenance, and logistics).	Nature of Operations — Parker Drilling, together with its subsidiaries (the Company), is a worldwide provider of contract drilling and drilling-related services and currently we operate in 12 countries. We have operated in over 50 foreign countries and the United States since beginning operations in 1934, making us among the most geographically experienced drilling contractors in the world. We have extensive experience and expertise in drilling geologically difficult wells and in managing the logistical and technological challenges of operating in remote, harsh and ecologically sensitive areas. We believe our quality, health, safety and environmental practices are leaders in our industry. Our rental tools subsidiary specializes in oil and natural gas drilling rental tools providing high-quality, reliable equipment, such as drill pipe, heavy-weight drill pipe, tubing, high-torque connections, BOPs and drill collars used for drilling, workover and production applications.
	Our rental tools business specializes in providing high-quality, reliable equipment and services for oil and natural gas drilling, workover and production applications. This includes drill pipe, heavy-weight drill pipe, tubing, high-torque connections, blow-out preventers (BOPs), drill collars, casing running systems, fishing services and more. On April 22, 2013, we acquired International Tubular Services Limited and certain of its affiliates (collectively, ITS) and other related assets (the ITS Acquisition — see also Note 2). ITS’s principal activities include the rental of drilling equipment and pressure control systems, provision of casing running systems and fishing services, together with machine shop support. ITS serves an extensive customer base of exploration and production (E&P) companies, drilling contractors and service companies from 21 operating facilities primarily located in the Middle East, Latin America, U.K. and Europe, and the Asia-Pacific regions.	Our U.S. barge drilling business operates barge rigs drill for natural gas, oil, and a combination of oil and natural gas in the shallow waters in and along the inland waterways of Louisiana, Alabama, and Texas. Our international drilling business provides extensive experience and expertise in drilling geologically difficult wells and in managing the logistical and technological challenges of operating in remote, harsh and ecologically sensitive areas. Additionally, our international drilling business includes operations and maintenance and other project management services, such as labor, maintenance, and logistics for operators who own their own drilling rigs, but choose Parker Drilling to operate the rigs for them. At December 31, 2012, our marketable rig fleet consisted of 14 barge drilling rigs and 24 land rigs located in the United States, Latin America and the Eastern Hemisphere regions. Our Technical services business includes engineering and related project services during the concept development, pre-FEED, and FEED (Front End Engineering Design) phases of our customer owned drilling facility projects. As these projects mature, we continue providing the same services during the Engineering, Procurement, Construction and Installation (EPCI) phase.
	Within our U.S. drilling business we operate barge rigs that drill for natural gas, oil, and a combination of oil and natural gas in the shallow waters in and along the inland waterways of Louisiana, Alabama, and Texas. Additionally in our U.S. drilling business, we have two Arctic-class rigs operating on the North Slope of Alaska and one O&M contract for offshore platform operations located in California. Our international drilling business includes operations related to Parker-owned and operated rigs as well as customer-owned rigs. We strive to deploy our fleet of Parker-owned rigs in markets where we expect to have opportunities to keep the rigs in service consistently. As of September 30, 2013, our marketable rig fleet consisted of 13 barge drilling rigs and 23 land rigs located in the United States, Latin America and the Eastern Hemisphere regions. We have 5 rigs held for sale or currently not marketed as of September 30, 2013. Our Technical Services business is our engineering expertise center, which provides services to our customers as well as to our ongoing drilling business. Services provided include engineering and related project services during the concept development, pre-FEED (Front End Engineering Design), and FEED phases of our customer owned drilling facility projects.
Consolidation	'	'
	Consolidation — The consolidated condensed financial statements include the accounts of Parker Drilling and subsidiaries over which we exercise control or have a controlling financial interest, including entities, if any, in which the Company is allocated a majority of the entity’s losses or returns, regardless of ownership percentage. If a subsidiary of Parker Drilling has a 50 percent interest in an entity but Parker Drilling’s interest in the subsidiary or the entity does not meet the consolidation criteria described above, then that interest is accounted for under the equity method.	Consolidation — The consolidated financial statements include the accounts of the Company and subsidiaries in which we exercise control or have a controlling financial interest, including entities, if any, in which the Company is allocated a majority of the entity’s losses or returns, regardless of ownership percentage. If a subsidiary of Parker Drilling has a 50 percent interest in an entity but Parker Drilling’s interest in the subsidiary or the entity does not meet the consolidation criteria described above, then that interest is accounted for under the equity method.
Noncontrolling Interest	'	'
	Noncontrolling Interest — We apply the accounting standards related to noncontrolling interests for ownership interests in our subsidiaries held by parties other than Parker Drilling. The entities that comprise the noncontrolling interest include Parker SMNG Drilling Limited Liability Company, Primorsky Drill Rig Services B.V., ITS Arabia Limited, and International Tubular Services — Egypt SAE. We report noncontrolling interest as equity on the consolidated balance sheets and report net income (loss) attributable to controlling interest and to noncontrolling interest separately on the consolidated statements of operations.	Noncontrolling Interest — We apply the accounting standards related to noncontrolling interests for ownership interests in our subsidiaries held by parties other than Parker Drilling. The entities that comprise the noncontrolling interest include Parker SMNG Drilling Limited Liability Company and Primorsky Drill Rig Services B.V. We report noncontrolling interest as equity on the consolidated balance sheets and report net income (loss) attributable to controlling interest and to noncontrolling interest separately on the consolidated statements of operations.
Reclassifications	'	'
	Reclassifications — Certain reclassifications have been made to prior period amounts to conform to the current period presentation. These reclassifications did not have a material effect on our consolidated condensed statements of operations, consolidated condensed balance sheets, condensed statement of comprehensive income or consolidated condensed statements of cash flows.	Reclassifications — Certain reclassifications have been made to prior period amounts to conform with the current period presentation. These reclassifications did not have a material effect on our consolidated statements of operations, consolidated balance sheets or statements of cash flows.
Revenue Recognition	'	'
	Revenue Recognition — Revenues from rental activities are recognized ratably over the rental term, which is generally less than six months. Contract drilling revenues and expenses, comprised of daywork drilling contracts and engineering and related project service contracts, are recognized as services are performed and collection is reasonably assured. For certain contracts, we receive payments contractually designated for the mobilization of rigs and other drilling equipment. Mobilization payments received, and direct costs incurred for the mobilization, are deferred and recognized over the term of the related drilling contract; however, costs incurred to relocate rigs and other drilling equipment to areas in which a contract has not been secured are expensed as incurred. Reimbursements received for out-of-pocket expenses are recorded as both revenues and direct costs. For contracts that are terminated prior to the specified term, early termination payments received by us are recognized as revenues when all contractual requirements are met.	Revenue Recognition — Contract drilling revenues and expenses, comprised of daywork drilling contracts and engineering and related project service contracts, are recognized as services are performed and collection is reasonably assured. For certain contracts, we receive payments contractually designated for the mobilization of rigs and other drilling equipment. Mobilization payments received, and direct costs incurred for the mobilization, are deferred and recognized over the term of the related drilling contract; however, costs incurred to relocate rigs and other drilling equipment to areas in which a contract has not been secured are expensed as incurred. Reimbursements received for out-of-pocket expenses are recorded as both revenues and direct costs. For contracts that are terminated prior to the specified term, early termination payments received by us are recognized as revenues when all contractual requirements are met. Revenues from rental activities are recognized ratably over the rental term which is generally less than six months. Construction contract revenues and costs are recognized on a percentage of completion basis utilizing the cost-to-cost method.
Reimbursable Costs	'	'
	Reimbursable Costs — Within certain contractual arrangements, we may procure, take title and risk of loss for certain equipment, or make certain expenditures on behalf of our customers. We typically receive fees for these services, which we record as revenues. We recognize reimbursements received for out-of-pocket expenditures as revenues and account for out-of-pocket expenditures as direct operating costs. Such amounts totaled $16.2 million and $12.1 million during the third quarters of 2013 and 2012, respectively and $46.5 million and $29.8 million for the nine months ended September 30, 2013 and 2012, respectively.	Reimbursable Costs — The Company recognizes reimbursements received for out-of-pocket expenses incurred as revenues and accounts for out-of-pocket expenses as direct operating costs. Such amounts totaled $44.9 million, $64.2 million, and $40.1 million during the years ended December 31, 2012, 2011, and 2010, respectively.
Use of Estimates	'	'
	Use of Estimates — The preparation of financial statements in accordance with accounting policies generally accepted in the United States (U.S. GAAP) requires us to make estimates and assumptions that affect our reported amounts of assets and liabilities, our disclosure of contingent assets and liabilities at the date of the financial statements, and our revenue and expenses during the periods reported. Estimates are typically used when accounting for certain significant items, such as allowance for doubtful accounts, legal or contractual liability accruals, mobilization and deferred mobilization, revenue and cost accounting for projects that follow the percentage of completion method, self-insured medical/dental plans, income taxes and valuation allowance, and other items requiring the use of estimates. Estimates are based on a number of variables which may include third party valuations, historical experience and assumptions that we believe are reasonable under the circumstances. Due to the inherent uncertainty involved with estimates, actual results may differ from management estimates.	Use of Estimates — The preparation of financial statements in accordance with U.S. GAAP requires us to make estimates and assumptions that affect our reported amounts of assets and liabilities, our disclosure of contingent assets and liabilities at the date of the financial statements, and our revenue and expenses during the periods reported. Estimates are typically used when accounting for certain significant items such as legal or contractual liability accruals, mobilization and deferred mobilization, revenue and cost accounting for projects that follow the percentage of completion method, self-insured medical/dental plans, and other items requiring the use of estimates. Estimates are based on a number of variables which may include third party valuations, historical experience, where applicable, and assumptions that we believe are reasonable under the circumstances. Due to the inherent uncertainty involved with estimates, actual results may differ from management estimates.
		During the third quarter of 2010, we corrected an accounting error relating to value added taxes (VAT) in our Western Kazakhstan branch (PDKBV). The cumulative effect of the error and related foreign currency translation impact overstated net income and retained earnings by $6.4 million over the period 2007 through 2009. The impact of the error was determined not to be material to our results of operations and financial position for any previously reported periods. Consequently, during the third quarter of 2010, the cumulative effect of this correction was recorded in operating expenses and is reflected in year to date operating expenses for the year ended December 31, 2010.
Cash and Cash Equivalents	'	'
		Cash and Cash Equivalents — For purposes of the consolidated balance sheets and the consolidated statements of cash flows, the Company considers cash equivalents to be highly liquid debt instruments that have a remaining maturity of three months or less at the date of purchase.
Accounts Receivable and Allowance for Doubtful Accounts	'	'
		Accounts Receivable and Allowance for Doubtful Accounts — Trade accounts receivable are recorded at the invoice amount and generally do not bear interest. The allowance for doubtful accounts is our best estimate for losses that may occur resulting from disputed amounts and the inability of our customers to pay amounts owed. We estimate the allowance based on historical write-off experience and information about specific customers. We review individually, for collectability, all balances over 90 days past due as well as balances due from any customer with respect to which we have information leading us to believe that a risk exist for potential collection.
		Account balances are charged off against the allowance when we believe it is probable the receivable will not be recovered. We do not have any off-balance-sheet credit exposure related to customers.


				December 31,
				2012			2011
				(Dollars in Thousands)
		Trade		$	176,029		$	184,817
		Notes receivable			650			650
		Allowance for doubtful accounts(1)			(8,117	)		(1,544	)

		Total accounts and notes receivable, net of allowance for bad debt		$	168,562		$	183,923


		1)	Additional information on the allowance for doubtful accounts for the years ended December 31, 2012, 2011 and 2010 is reported on Schedule II — Valuation and Qualifying Accounts.
Property, Plant and Equipment	'	'
		Property, Plant and Equipment — We account for depreciation of property, plant and equipment on the straight line method over the estimated useful lives of the assets after provision for salvage value. Depreciation, for tax purposes, utilizes several methods of accelerated depreciation. Depreciable lives for different categories of property, plant and equipment are as follows:


		Land drilling equipment		3 to 20 years
		Barge drilling equipment		3 to 20 years
		Drill pipe, rental tools and other		4 to 7 years
		Buildings and improvements		15 to 30 years
Annual Impairment Review	'	'
		Annual Impairment Review — We review the carrying amounts of long-lived assets for potential impairment annually, typically during the fourth quarter, or when events occur or circumstances change that indicate the carrying value of such assets may not be recoverable. We determine recoverability by evaluating the undiscounted estimated future net cash flows. When impairment is indicated, we measure the impairment as the amount by which the assets’ carrying value exceeds its fair value. Management considers a number of factors such as estimated future cash flows from the assets, appraisals and current market value analysis in determining fair value. Assets are written down to fair value if the final estimate of current fair value is below the net carrying value.
Capitalized Interest	'	'
	Capitalized Interest — Interest from external borrowings is capitalized on major projects until the assets are ready for their intended use. Capitalized interest is added to the cost of the underlying assets and is amortized over the useful lives of the assets in the same manner as the underlying assets. Capitalized interest reduces net interest expense in the consolidated condensed statements of operations. During the three and nine months ended September 30, 2013, we capitalized interest costs of $0.7 million and $1.7 million, respectively, which were primarily related to a new enterprise resource planning system. During the three and nine months ended September 30, 2012 we capitalized $2.5 million and $7.9 million, respectively, of interest costs primarily related to the two Arctic-class rigs in Alaska.	Capitalized Interest — Interest from external borrowings is capitalized on major projects until the assets are ready for their intended use. Capitalized interest is added to the cost of the underlying asset and is amortized over the useful lives of the assets in the same manner as the underlying assets. Capitalized interest costs reduce net interest expense in the consolidated statements of operations. During 2012, 2011 and 2010, we capitalized interest costs related to the construction of rigs of $10.2 million, $19.3 million and $13.5 million, respectively.
Assets held for sale	'	'
		Assets held for sale — We classify an asset as held for sale when the facts and circumstances meet the criteria for such classification, including the following: (a) we have committed to a plan to sell the asset, (b) the asset is available for immediate sale, (c) we have initiated actions to complete the sale, including locating a buyer, (d) the sale is expected to be completed within one year, (e) the asset is being actively marketed at a price that is reasonable relative to its fair value, and (f) the plan to sell is unlikely to be subject to significant changes or termination. At December 31, 2012 and 2011, we had net assets held for sale, included in current assets, in the amounts of $11.6 million and $5.3 million, respectively. For further information, see Note 4.
Rig Materials and Supplies	'	'
		Rig Materials and Supplies — Because our international drilling generally occurs in remote locations, making timely outside delivery of spare parts uncertain, a complement of parts and supplies is maintained either at the drilling site or in warehouses close to the operation. During periods of high rig utilization, these parts are generally consumed and replenished within a one-year period. During a period of lower rig utilization in a particular location, the parts, like the related idle rigs, are generally not transferred to other international locations until new contracts are obtained because of the significant transportation costs, that would result from such transfers. We classify those parts which are not expected to be utilized in the following year as long-term assets. Rig materials and supplies are valued at the lower of cost or market value.
Deferred Costs	'	'
		Deferred Costs — We defer costs related to rig mobilization and amortize such costs over the term of the related contract. The costs to be amortized within twelve months are classified as current.
Debt Issuance Costs	'	'
		Debt Issuance Costs — We typically defer costs associated with debt financings and refinancing, and amortize those costs over the term of the related debt.
Income Taxes	'	'
		Income Taxes — Income taxes are accounted for under the asset and liability method and have been provided based upon tax laws and rates in effect in the countries in which operations are conducted and income is earned. There is little or no expected relationship between the provision for or benefit from income taxes and income or loss before income taxes as the countries in which we operate have taxation regimes that vary not only with respect to nominal rate, but also in terms of the availability of deductions, credits, and other benefits. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which the temporary differences are expected to be recovered or settled and the effect of changes in tax rates is recognized in income in the period in which the change is enacted. Accordingly, the impact of the American Taxpayer Relief Act of 2012, which was enacted January 2, 2013, will be recognized in 2013, not 2012. The Company recognizes the effect of income tax positions only if those positions are more likely than not to be sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized and changes in recognition or measurement are reflected in the period in which the change in judgment occurs.
Earnings (Loss) Per Share (EPS)	'	'
		Earnings (Loss) Per Share (EPS) — Basic earnings (loss) per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. The effects of dilutive securities, stock options, unvested restricted stock and convertible debt are included in the diluted EPS calculation, when applicable.
Concentrations of Credit Risk	'	'
	Concentrations of Credit Risk — Financial instruments, which potentially subject us to concentrations of credit risk, consist primarily of trade receivables. We generally do not require collateral on our trade receivables.	Concentrations of Credit Risk — Financial instruments, that potentially subject the Company to concentrations of credit risk consist primarily of trade receivables with a variety of national and international oil and natural gas companies. We generally do not require collateral on our trade receivables.
	At September 30, 2013 and December 31, 2012, we had deposits in domestic banks in excess of federally insured limits of approximately $117.1 million and $12.2 million, respectively. The increase is primarily because as of January 1, 2013, all regular checking account deposits are only guaranteed up to $250,000 at each institution while prior to January 1, 2013, all regular checking account deposits were guaranteed, except investments. In addition, as of September 30, 2013 and December 31, 2012, we had uninsured deposits in foreign banks of $51.8 million and $34.5 million, respectively.	At December 31, 2012 and 2011, we had deposits in domestic banks in excess of federally insured limits of approximately $12.2 million and $10.2 million, respectively. In addition, we had deposits in foreign banks, which were not insured at December 31, 2012 and 2011 of $34.5 million and $38.4 million, respectively.
	Our customer base consists primarily of major, independent, national and international oil and gas companies and integrated service providers. We depend on a limited number of customers. Our largest customer, Exxon Neftegas Limited, constituted 14.3% of our total year-to-date revenues as of September 30, 2013. Each of our segments depends on a limited number of key customers and the loss of any one or more key customers could have a material adverse effect on a segment.	Our customer base consists of major, independent and national oil and natural gas companies and integrated service providers. We depend on a limited number of significant customers. Our two largest customers, Exxon Neftegas Limited (ENL) and Schlumberger, constituted 11.8 percent and 10.4 percent, respectively of our revenues for 2012.
Construction Contract	'	'
		Construction Contract — For the periods reported, our construction contract business included only the drilling rig construction project for BP. In November 2010, our customer, BP, informed us that it was suspending construction on the project to review the rig’s engineering and design, including its safety systems. The Liberty rig construction contract was a fixed fee and reimbursable contract that we accounted for on a percentage of completion basis. As of December 31, 2011 and 2010, we had recognized $335.5 million and $325.9 million in project-to-date revenues, respectively. We have recognized the entire $11.7 million fixed fee margin on the contract.
		The Liberty rig construction contract expired on February 8, 2011 prior to completion of the rig. Before expiration of the construction contract, BP identified several areas of concern relating to design, construction and invoicing for which it asked us to provide explanations and documentation, and we have done so. Although we provided BP with the requested information, we do not know when or how these issues will be resolved with our client.
		After expiration of the construction contract, the Company and BP continued activities to preserve and maintain the rig under the “pre-operations” phase of our contract, which was entered into in August 2009 and expired on July 1, 2011. A new consulting services agreement was reached between the Company and BP effective July 1, 2011. Under the consulting services agreement, we assisted BP in a review of the rig’s design, the creation of a new statement of requirements for the rig, and the transition of documentation and materials to BP. All work under the consulting agreement has been completed and we are engaged with BP on construction contract close-out resolution. In June 2012, BP publicly announced that it had made the decision to suspend the Liberty project indefinitely. We do not know whether or how that decision may impact our discussions with BP related to contract close-out.
Fair value measurements	'	'
		Fair value measurements — For purposes of recording fair value adjustments for certain financial and non-financial assets and liabilities, and determining fair value disclosures, we estimate fair value at a price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants in the principal market for the asset or liability. Our valuation technique requires inputs that we categorize using a three-level hierarchy, from highest to lowest level of observable inputs, as follows: (1) unadjusted quoted prices for identical assets or liabilities in active markets (Level 1), (2) direct or indirect observable inputs, including quoted prices or other market data, for similar assets or liabilities in active markets or identical assets or liabilities in less active markets (Level 2) and (3) unobservable inputs that require significant judgment for which there is little or no market data (Level 3). When multiple input levels are required for a valuation, we categorize the entire fair value measurement according to the lowest level of input that is significant to the measurement even though we may have also utilized significant inputs that are more readily observable.
Derivative Financial Instruments	'	'
		Derivative Financial Instruments — We use derivative instruments to manage risks associated with interest rate fluctuations in connection with our Credit Agreement (see Note 7). These derivative instruments, which consist of variable-to-fixed interest rate swaps, are not designated as hedges. Accordingly, the change in the fair value of the interest rate swaps is recognized in earnings at each reporting period.
Stock-Based Compensation	'	'
		Stock-Based Compensation — Under our long term incentive plans, we grant restricted stock awards (RSA), restricted stock units (RSU) and performance units (PU). For service-based awards and performance-based awards with graded vesting conditions, we recognize compensation expense on a straight-line basis over the service period for each separately vesting portion of the award as if the award was, in substance, multiple awards. For market-based awards that vest at the end of the service period, we recognize compensation expense on a straight-line basis through the end of the service period. Share-based awards generally vest over three years.
		Share-based compensation expense is recognized, net of an estimated forfeiture rate, which is based on historical experience and adjusted, if necessary, in subsequent periods based on actual forfeitures. The fair value of nonvested RSA’s and RSU’s is determined based on the closing trading price of the company’s shares on the grant date. Our RSA’s and RSU’s are settled in stock upon vesting. Our PU awards can be settled in cash or stock at the discretion of the compensation committee of the board of directors and are, therefore, accounted for as liability awards under the stock compensation rules of U.S. GAAP.
		We recognize share-based compensation expense in the same financial statement line item as cash compensation paid to the respective employees. Tax deduction benefits for awards in excess of recognized compensation costs are reported as a financing cash flow.
Comprehensive Income	'	'
		Comprehensive Income — In June 2011, the FASB issued Accounting Standards Update 2011-05, “Presentation of Comprehensive Income.” This update will increase the prominence of comprehensive income in the financial statements. It gives an entity the option to present the components of net income and comprehensive income in either a single continuous statement or in two separate but consecutive financial statements and eliminates the option to present other comprehensive income in the statement of changes in equity. This update will be effective for us beginning in the first quarter of 2012. This update did not have a material impact on our financial position, results of operations, cash flows, or disclosures.
		Comprehensive Income — On January 1, 2012, we adopted an update issued by the FASB to existing guidance on the presentation of comprehensive income. The update eliminates the option to present the components of other comprehensive income (OCI) as part of the statement of changes in stockholders’ equity. Public entities are required to comply with the new reporting requirements for fiscal years beginning after December 15, 2011 and interim periods within those years. Calendar year-end companies must adopt the requirements for the quarter ended March 31, 2012. The adoption of this update did not have a material impact on our financial position, results of operations, cash flows, or disclosures.
Impairment	'	'
		Impairment — In July 2012, the Financial Accounting Standards Board (FASB) issued an update to existing guidance on the impairment assessment of indefinite-lived intangibles. This update simplifies the impairment assessment of indefinite-lived intangibles by allowing companies to consider qualitative factors to determine whether it is more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount before performing the two step impairment review process. The adoption of this update did not have an impact on our condensed consolidated financial statements.
Acquisitions-purchase price allocation	'	'
	Acquisitions-purchase price allocation — We allocate the purchase price of an acquired business to its identifiable assets and liabilities based on estimated fair values at the transaction date. Transaction and integration costs associated with an acquisition are expensed as incurred. The excess of the purchase price over the amount allocated to the assets and liabilities, if any, is recorded as goodwill. We use all available information to estimate fair values, including quoted market prices, the carrying value of acquired assets, and widely accepted valuation techniques such as discounted cash flows. We engage third-party appraisal firms to assist in fair value determination of inventories, identifiable intangible assets, and any other significant assets or liabilities when appropriate. The judgments made in determining the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can materially impact our results of operations.
Intangible Assets	'	'
	Intangible Assets — Upon the ITS Acquisition, we recorded $10.0 million and $0.2 million, respectively, to recognize the fair values of definite and indefinite lived intangible assets (see Note 2 — Acquisition of ITS ). Definite lived intangible assets recorded in connection with the ITS Acquisition primarily relate to trade names, customer relationships, and developed technology and will be amortized over a weighted average period of approximately 3 years. With regard to indefinite lived intangible assets, which relate to our development of technology, we will conduct impairment tests annually, or more frequently, if events or changes in circumstances indicate that the asset might be impaired.
Recent Accounting Pronouncements	'	'
	Effective January 1, 2012, we adopted the accounting standards update that changes the wording used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. Some of the amendments included in this update are intended to clarify the applications of existing fair value measurement requirements. The update was effective for annual periods beginning after December 15, 2011. Our adoption did not have a material effect on the disclosures contained in our notes to the consolidated financial statements.
	In July 2012, the FASB issued an update to existing guidance on the impairment assessment of indefinite-lived intangibles. This update simplifies the impairment assessment of indefinite-lived intangibles by allowing companies to consider qualitative factors to determine whether it is more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount before performing the two step impairment review process. The adoption of this update did not have an impact on our condensed consolidated financial statements.
	In February 2013, the FASB issued ASU 2013-02, Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, which requires that companies present, either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified from each component of accumulated other comprehensive income based on its source and the income statement line items affected by the reclassification. This accounting guidance is effective for our first quarter in fiscal 2014 and is only expected to impact the presentation of our consolidated financial statements and related notes.
	In July 2013, the FASB issued an update to existing guidance on presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. This ASU requires an entity to present an unrecognized tax benefit as a reduction of a deferred tax asset for a net operating loss (NOL) carryforward, or similar tax loss or tax credit carryforward, rather than as a liability when (1) the uncertain tax position would reduce the NOL or other carryforward under the tax law of the applicable jurisdiction and (2) the entity intends to use the deferred tax asset for that purpose. The ASU does not require new recurring disclosures. It is effective prospectively for our first quarter in fiscal 2014. We do not expect the adoption of this update to have an impact on our condensed consolidated financial statements.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
Summary of Significant Accounting Policies (Tables)	Dec. 31, 2012
Summary of Significant Total Accounts and Notes Receivable	'
	Account balances are charged off against the allowance when we believe it is probable the receivable will not be recovered. We do not have any off-balance-sheet credit exposure related to customers.


			December 31,
			2012			2011
			(Dollars in Thousands)
	Trade		$	176,029		$	184,817
	Notes receivable			650			650
	Allowance for doubtful accounts(1)			(8,117	)		(1,544	)

	Total accounts and notes receivable, net of allowance for bad debt		$	168,562		$	183,923


	1)	Additional information on the allowance for doubtful accounts for the years ended December 31, 2012, 2011 and 2010 is reported on Schedule II — Valuation and Qualifying Accounts.
Summary of Depreciable Lives for Different Categories of Property Plant and Equipment	'
	Depreciable lives for different categories of property, plant and equipment are as follows:


	Land drilling equipment		3 to 20 years
	Barge drilling equipment		3 to 20 years
	Drill pipe, rental tools and other		4 to 7 years
	Buildings and improvements		15 to 30 years

Income_Tax_BenefitExpense_Tabl

Income Tax Benefit/Expense (Tables)	12 Months Ended
Income Tax Benefit/Expense (Tables)	Dec. 31, 2012
Summary of Income (Loss) Before Income Taxes	'
	Income (loss) before income taxes is summarized below:


		Year Ended December 31,
		2012			2011			2010
		(Dollars in Thousands)
	United States	$	52,422		$	(61,434	)	$	1,865
	Foreign		18,555			(3,978	)		9,640

		$	70,977		$	(65,412	)	$	11,505

Summary of Income Tax Expense (Benefit)	'
	Income tax expense (benefit) is summarized as follows:


		Year Ended December 31,
		2012			2011			2010
		(Dollars in Thousands)
	Current:
	United States:
	Federal	$	7,791		$	17,168		$	(273	)
	State		733			1,264			184
	Foreign		9,518			15,176			27,610
	Deferred:
	United States:
	Federal		15,612			(46,694	)		(3,981	)
	State		4,296			1,864			1,459
	Foreign		(4,071	)		(3,545	)		1,214

		$	33,879		$	(14,767	)	$	26,213

Schedule of Income Tax Reconciliation from Federal Income Tax Statutory Rate	'
	Total income tax expense differs from the amount computed by multiplying income before income taxes by the U.S. federal income tax statutory rate. The reasons for this difference are as follows:


		Year Ended December 31,
		2012						2011						2010
		(Dollars in Thousands)
		Amount			% of Pre-Tax			Amount			% of Pre-Tax			Amount			% of Pre-Tax
		Amount			Income			Amount			Income			Amount			Income
	Computed Expected Tax Expense	$	24,842			35	%	$	(22,894	)		35	%	$	4,027			35	%
	Foreign Taxes		13,428			19	%		15,644			-24	%		18,951			165	%
	Tax Effect Different From Statutory Rates		(8,080	)		-11	%		(1,571	)		2	%		(7,996	)		-70	%
	State Taxes, net of federal benefit		4,757			7	%		2,689			-4	%		1,579			14	%
	Foreign Tax Credits		(1,867	)		-3	%		(14,595	)		22	%		(15,442	)		-134	%
	Kazakhstan Tax Settlement		—			0	%		(536	)		1	%		13,304			116	%
	Mexico Tax Settlement		—			0	%		—			0	%		1,022			9	%
	Change in Valuation Allowance		(1,662	)		-2	%		2,542			-4	%		506			4	%
	Uncertain Tax Positions		(6,814	)		-10	%		1,348			-2	%		983			9	%
	Permanent Differences		5,477			8	%		6,356			-10	%		6,003			52	%
	Prior Year Return to Provision Adjustments		2,948			4	%		835			-1	%		1,775			15	%
	Other		850			1	%		899			-1	%		1,501			13	%
	Unremitted Foreign Earnings-Current Year Adjustment		—			0	%		(5,484	)		8	%		—			0	%

	Actual Tax Expense	$	33,879			48	%	$	(14,767	)		22	%	$	26,213			228	%

Components of Deferred Tax Assets and Liabilities	'
	The components of the Company’s deferred tax assets and liabilities as of December 31, 2012 and 2011 are shown below:


		December 31,
		2012			2011
		(Dollars in Thousands)
	Deferred tax assets
	Current deferred tax assets:
	Reserves established against realization of certain assets	$	1,634		$	3,284
	Accruals		6,747			3,065
	Other		361			301

	Gross current deferred tax assets		8,742			6,650
	Valuation allowance		—			—

	Current deferred tax assets		8,742			6,650

	Non-current deferred tax assets:
	Federal net operating loss carryforwards		—			361
	State net operating loss carryforwards		3,095			6,393
	Other state deferred tax asset, net		914			656
	Foreign Tax Credits		25,977			28,146
	Note Hedge Interest		—			1,318
	Uncertain tax positions		8,015			8,188
	Foreign tax		5,838			9,824
	Impairment of long-lived assets		56,190			59,500
	Other		71			392

	Gross long-term deferred tax assets		100,100			114,778
	Valuation Allowance		(4,805	)		(6,467	)

	Non-current deferred tax assets, net of valuation allowance		95,295			108,311

	Net deferred tax assets		104,037			114,961

	Deferred tax liabilities:
	Non-current deferred tax liabilities:
	Property, Plant and equipment		(19,139	)		(8,986	)
	Accruals		(1,066	)		—
	Foreign tax		—			(6,379	)
	Convertible Debt		—			(31	)
	Deferred compensation		2,001			1,243
	Other state deferred tax liability, net		(2,643	)
	Other		—			(630	)

	Gross non-current deferred tax liabilities		(20,847	)		(15,934	)

	Net deferred tax asset	$	83,190		$	99,027

Reconciliation of Unrecognized Tax Benefits	'
	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:


		In Thousands
	Balance at January 1, 2012	$	(15,492	)
	Additions based on tax positions taken during a prior period		(1,495	)
	Reductions based on tax positions taken during a prior period		4,102
	Reductions related to a lapse of applicable statute of limitations		2,855

	Balance at December 31, 2012	$	(10,030	)

Open Tax Years by Major Tax Jurisdiction	'
	In many cases, our uncertain tax positions are related to tax years that remain subject to examination by tax authorities. The following describes the open tax years, by major tax jurisdiction, as of December 31, 2012:


	Colombia	2008-present
	Kazakhstan	2007-present
	Mexico	2007-present
	Papua New Guinea	2010-present
	Russia	2009-present
	United States — Federal	2011-present

LongTerm_Debt_Tables

Long-Term Debt (Tables)	9 Months Ended					12 Months Ended
Long-Term Debt (Tables)	Sep. 30, 2013					Dec. 31, 2012
Summary of Company's Current Debt Portfolio	'					'
	The following table illustrates our debt portfolio as of September 30, 2013 and December 31, 2012:					The following table illustrates the Company’s current debt portfolio as of December 31, 2012 and December 31, 2011:


		September 30,		December 31,			December 31,
		2013		2012			2012		2011
		(Dollars in Thousands)					(Dollars in Thousands)
	7.50% Senior Notes, due August 2020	$	225,000	$	—	Senior Notes — payable in April 2018; fixed interest at 9.125% payable semi-annually in April and October (Issued March 22, 2010).	$	300,000	$	300,000
	9.125% Senior Notes, due April 2018		428,968		429,205	Senior Notes — payable in April 2018; fixed interest at 9.125% payable semi-annually in April and October (Issued April 25, 2012).		129,205		—
	Term Note, due December 2017		—		50,000	$125.0 million aggregate principal Convertible Senior Notes — payable in July 2012; interest at 2.125% payable semi-annually in January and July, net of unamortized discount of $3,277 at December 31, 2011.		—		121,723
						Term Note — amortizes $2.5 million per quarter beginning March 31, 2013 ($6.0 million per quarter prior to March 31, 2013); interest at prime, plus an applicable margin or LIBOR, plus an applicable margin. (Effective interest rate of 3.21% and 3.55% at December 31, 2012 and December 31, 2011, respectively)		50,000		61,000
	Total debt		653,968		479,205	Total debt		479,205		482,723

	Less current portion		—		10,000	Less current portion		10,000		145,723
						Total long-term debt	$	469,205	$	337,000
	Total long-term debt	$	653,968	$	469,205

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	9 Months Ended									12 Months Ended
Fair Value of Financial Instruments (Tables)	Sep. 30, 2013									Dec. 31, 2012
Fair Values and Related Carrying Values of Debt Instruments	'									'
	Fair values and related carrying values of our debt instruments were as follows for the periods indicated:									Fair value of our debt instruments is determined using Level 2 inputs. Fair values and related carrying values of our debt instruments are as follows:


		September 30, 2013				December 31, 2012					December 31, 2012				December 31, 2011
		Carrying		Fair Value		Carrying		Fair Value			Carrying Amount		Fair Value		Carrying Amount		Fair Value
		Amount		Fair Value		Amount		Fair Value			(in thousands)
		(in thousands)								Long-term Debt
	Long-term Debt									9.125% Notes	$	300,000	$	320,250	$	300,000	$	315,000
	7.50% Notes	$	225,000	$	225,000	$	—	$	—	9.125% Notes	$	125,000	$	133,438
	9.125% Notes		425,000		454,750		425,000		453,688	2.125% Notes		—		—		125,000		123,204

	Total	$	650,000	$	679,750	$	425,000	$	453,688	Total	$	425,000	$	453,688	$	425,000	$	438,204

Common_Stock_and_Stockholders_1

Common Stock and Stockholders' Equity (Tables)	12 Months Ended
Common Stock and Stockholders' Equity (Tables)	Dec. 31, 2012
Summary of Long-Term Incentive Plans	'
	Information regarding the Company’s Long-Term Incentive plans is summarized below:


	Nonvested Shares	Shares			Weighted
					Average
					Grant-Date
					Fair Value
	Nonvested at January 1, 2012		2,813,409		$	6.91
	Granted		1,558,347			5.37
	Vested		(1,472,233	)		4.86
	Forfeited		(505,626	)		5.44

	Nonvested at December 31, 2012		2,393,897		$	5.22

Earnings_per_share_EPS_Tables

Earnings per share (EPS) (Tables)	9 Months Ended								12 Months Ended
Earnings per share (EPS) (Tables)	Sep. 30, 2013								Dec. 31, 2012
Summary of Earnings Per Share (EPS)	'								'
									Reconciliation of Income and Number of Shares Used to Calculate Basic and Diluted Earnings per Share (EPS)
		Three Months Ended September 30, 2013
		Income		Shares		Per-Share
		(Numerator)		(Denominator)		Amount				For the Year Ended December 31, 2012
	Basic EPS	$	7,970,000		119,990,196	$	0.07			Income			Shares		Per-Share
	Effect of dilutive securities:									(Numerator)			(Denominator)		Amount
	Restricted stock		—		1,684,395		—		Basic EPS	$	37,313,000			117,721,135	$	0.32
									Effect of dilutive securities:
	Diluted EPS	$	7,970,000		121,674,591	$	0.07		Stock options and restricted stock					1,372,455	$	(0.01	)

									Diluted EPS	$	37,313,000			119,093,590	$	0.31

		Nine Months Ended September 30, 2013
		Income		Shares		Per-Share				For the Year Ended December 31, 2011
		(Numerator)		(Denominator)		Amount				Income			Shares		Per-Share
	Basic EPS	$	16,843,000		119,443,260	$	0.14			(Numerator)			(Denominator)		Amount
	Effect of dilutive securities:								Basic EPS	$	(50,451,000	)		116,081,590	$	(0.43	)
	Restricted stock		—		2,250,521		—		Effect of dilutive securities:
									Stock options and restricted stock					—	$	—
	Diluted EPS	$	16,843,000		121,693,781	$	0.14
									Diluted EPS:	$	(50,451,000	)		116,081,590	$	(0.43	)

		Three Months Ended September 30, 2012
		Income		Shares		Per-Share				For the Year Ended December 31, 2010
		(Numerator)		(Denominator)		Amount				Income			Shares		Per-Share
	Basic EPS	$	10,936,000		118,109,214	$	0.09			(Numerator)			(Denominator)		Amount
	Effect of dilutive securities:								Basic EPS	$	(14,461,000	)		114,258,965	$	(0.13	)
	Restricted stock		—		1,091,805		—		Effect of dilutive securities:
									Stock options and restricted stock					—	$	—
	Diluted EPS	$	10,936,000		119,201,019	$	0.09
									Diluted EPS:	$	(14,461,000	)		114,258,965	$	(0.13	)

		Nine Months Ended September 30, 2012
		Income		Shares		Per-Share
		(Numerator)		(Denominator)		Amount
	Basic EPS	$	57,411,000		117,458,365	$	0.49
	Effect of dilutive securities:
	Restricted stock		—		1,351,830		(0.01	)

	Diluted EPS	$	57,411,000		118,810,195	$	0.48

Reportable_Segments_Tables

Reportable Segments (Tables)	9 Months Ended														12 Months Ended
Reportable Segments (Tables)	Sep. 30, 2013														Dec. 31, 2012
Results of Operations by Reportable Segment	'														'
	The following table represents the results of operations by reportable segment:														The following table represents the results of operations by reportable segment:


			Three Months Ended						Nine Months Ended								Year Ended December 31,
			September 30,						September 30,						Operations by Reportable Industry Segment:		2012			2011			2010
	Operations by Reportable Industry Segment		2013			2012			2013			2012					(Dollars in Thousands)
			(Dollars in Thousands)						(Dollars in Thousands)						Revenues:
	Revenues:														Rental Tools(1)		$	246,900		$	237,068		$	172,598
	Rental Tools		$	89,614		$	59,947		$	228,718		$	191,233		U.S. Barge Drilling(1)			123,672			93,763			64,543
	U.S. Barge Drilling			33,919			33,142			102,085			94,269		U.S. Drilling(1)(3)			1,387			—			—
	U.S. Drilling			18,693			—			48,238			—		International Drilling(1)			291,772			318,482			294,821
	International Drilling(1)			88,562			68,503			236,394			224,176		Technical Services(1)			14,251			27,695			36,423
	Technical Services			6,974			3,709			15,483			11,117		Construction Contract(1)			—			9,638			91,090

	Total revenues			237,762			165,301			630,918			520,795		Total revenues			677,982			686,646			659,475

	Operating gross margin(2):														Operating income:
	Rental Tools			25,816			27,032			72,470			91,885		Rental Tools(2)			113,899			120,822			74,541
	U.S. Barge Drilling			12,236			11,042			37,657			29,215		U.S. Barge Drilling(2)			39,774			11,116			(11,503	)
	U.S. Drilling			103			(4,712	)		(4,618	)		(7,881	)	U.S. Drilling(2)			(15,168	)		(3,915	)		(217	)
	International Drilling			9,831			783			12,815			21,395		International Drilling(2)			12,642			22,237			5,092
	Technical Services			153			(107	)		584			(118	)	Technical Services(2)			(246	)		5,335			5,052
															Construction Contract(2)			—			771			202
	Total operating gross margin			48,139			34,038			118,908			134,496
	General and administrative expense			(14,188	)		(8,905	)		(49,449	)		(21,822	)	Total operating gross margin			150,901			156,366			73,167
	Gain on disposition of assets, net			1,094			606			2,759			2,466		General and administrative expense			(46,052	)		(31,314	)		(30,728	)
															Impairments and other charges			—			(170,000	)		—
	Total operating income			35,045			25,739			72,218			115,140		Provision for reduction in carrying value of certain assets			—			(1,350	)		(1,952	)
	Interest expense			(13,127	)		(8,171	)		(33,874	)		(25,133	)	Gain on disposition of assets, net			1,974			3,659			4,620
	Interest income			130			30			2,392			109
	Loss on extinguishment of debt			(5,218	)		(117	)		(5,218	)		(1,766	)	Total operating income (loss)			106,823			(42,639	)		45,107
	Changes in fair value of derivative positions			—			19			54			8		Interest expense			(33,542	)		(22,594	)		(26,805	)
	Other			400			26			333			62		Changes in fair value of derivative positions			55			(110	)		—
															Loss on extinguishment of debt			(2,130	)		—			(7,209	)
	Income before income taxes		$	17,230		$	17,526		$	35,905		$	88,420		Other			(229	)		(69	)		412

															Income (loss) from continuing operations before income taxes		$	70,977		$	(65,412	)	$	11,505

	Identifiable assets:		September 30,			December 31,
			2013			2012
			(Dollars in Thousands)														2012			2011
	Rental Tools		$	375,900		$	194,600								Identifiable assets:
	U.S. Barge Drilling			84,402			99,409								Rental Tools		$	194,600		$	188,520
	U.S. Drilling			367,020			374,794								U.S. Barge Drilling			99,409			108,396
	International Drilling			466,356			414,546								U.S. Drilling			374,794			265,166
															International Drilling			414,546			426,490
	Total identifiable assets			1,293,678			1,083,349
	Corporate assets(3)			241,702			172,384								Total identifiable assets			1,083,349			988,572
															Corporate and other assets(4)			172,384			227,674
	Total assets		$	1,535,380		$	1,255,733
															Total assets		$	1,255,733		$	1,216,246

		-1	For the nine months ended September 30, 2013, our largest customer, Exxon Neftegas Limited, constituted 14.3% of our total consolidated revenues and approximately 36.9% of our International Drilling segment. For the nine months ended September 30, 2012, our two largest customers, Exxon Neftegas Limited (ENL) and Schlumberger, constituted approximately 10.6% and 10.2%, respectively, of our total consolidated revenues and approximately 32.0% and 24.0%, respectively, of our International Drilling segments.
		-2	Operating gross margin is calculated as revenues less direct operating expenses, including depreciation and amortization expense.												1)	In 2012, our two largest customers, Exxon Neftegas Limited (ENL) and Schlumberger, constituted approximately 12 percent and 10 percent, respectively, of our total consolidated revenues and approximately 27 percent and 24 percent of our International Drilling segment, respectively. In 2011, our largest customer, ENL constituted approximately 16 percent of our total revenues and approximately 34 percent of our International Drilling segment. In 2010, our two largest customers BP and ExxonMobil both accounted for approximately 12 percent of the Company’s total revenues. In 2010, BP accounted for 90 percent of our construction contract segment revenues and ExxonMobil accounted for approximately 22 percent of our International Drilling segment and 7 percent of our Rental Tools segment.
		-3	This category includes corporate assets as well as minimal assets for our Technical Services segment primarily related to office furniture and fixtures.												2)	Operating income is calculated as revenues less direct operating expenses, including depreciation and amortization expense.
															3)	As of December 31, 2011, this segment had not begun generating revenue.
															4)	This category includes corporate assets as well as minimal assets for our Technical Services segment primarily related to office furniture and fixtures.
Operations by Industry Segment	'														'

																	Year ended December 31,
															Operations by Reportable Industry Segment:		2012			2011			2010
																	(Dollars in Thousands)
															Capital expenditures:
															Rental Tools		$	61,958		$	61,702		$	48,872
															U.S. Barge Drilling			8,808			7,339			5,315
															U.S. Drilling			86,786			99,915			113,177
															International Drilling			15,240			15,011			50,482
															Corporate			18,751			6,432			1,338

															Total capital expenditures		$	191,543		$	190,399		$	219,184

															Depreciation and amortization:
															Rental Tools			42,944			40,497			36,558
															U.S. Barge Drilling			13,906			17,006			22,165
															U.S. Drilling			7,011			2,223			—
															International Drilling			45,967			48,965			52,429
															Corporate and other(1)			3,189			3,445			3,878

															Total depreciation and amortization		$	113,017		$	112,136		$	115,030


															1)	This category includes depreciation of corporate assets as well as minimal depreciation for our Technical Services segment primarily related to office furniture and fixtures.
Operations by Geographical Area	'														'

																	Year Ended December 31,
															Operations by Geographic Area:		2012			2011			2010
																	(Dollars in Thousands)
															Revenues:
															Africa and Middle East		$	26,528		$	6,774		$	22,621
															Asia Pacific			39,400			38,477			26,416
															CIS			122,304			176,421			149,963
															Latin America			103,540			96,810			103,885
															United States			386,210			368,164			356,590

															Total revenues			677,982			686,646			659,475

															Operating gross margin:
															Africa and Middle East(1)			(2,234	)		(6,383	)		659
															Asia Pacific(1)			(927	)		1,933			2,374
															CIS(1)			6,840			26,402			8,139
															Latin America(1)			8,990			377			1,210
															United States(1)			138,232			134,037			60,785

															Total operating gross margin			150,901			156,366			73,167

															General and administrative expense			(46,052	)		(31,314	)		(30,728	)
															Impairments and other charges			—			(170,000	)		—
															Provision for reduction in carrying value of certain assets			—			(1,350	)		(1,952	)
															Gain on disposition of assets, net			1,974			3,659			4,620

															Total operating income (loss)			106,823			(42,639	)		45,107
															Interest expense			(33,542	)		(22,594	)		(26,805	)
															Changes in fair value of derivative positions			55			(110	)		—
															Loss on extinguishment of debt			(2,130	)		—			(7,209	)
															Other			(229	)		(69	)		412

															Income (loss) from continuing operations before income taxes		$	70,977		$	(65,412	)	$	11,505

															Long-lived assets:(2)
															Africa and Middle East		$	25,032		$	28,427
															Asia Pacific			15,723			18,300
															CIS			106,774			119,282
															Latin America			63,899			57,710
															United States			574,730			496,090

															Total long-lived assets		$	786,158		$	719,809


															1)	Operating income is calculated as revenues less direct operating expenses, including depreciation and amortization expense.
															2)	Long-lived assets primarily consist of property, plant and equipment, net and exclude assets held for sale, if any.

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
Commitments and Contingencies (Tables)	Dec. 31, 2012
Schedule of Future Minimum Lease Payments Under Operating Leases with Non Cancelable Terms	'
	Future minimum lease payments at December 31, 2012, under operating leases with non-cancelable terms are as follows:

		Year Ended
		December 31,
		(Dollars in Thousands)
	2013	$	6,734
	2014		4,134
	2015		3,851
	2016		2,742
	2017		2,092
	Thereafter		8,209

	Total	$	27,762

Parent_Guarantor_NonGuarantor_1

Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements (Tables)	9 Months Ended																					12 Months Ended
	Sep. 30, 2013																					Dec. 31, 2012
Consolidating Condensed Statement of Operations	'																					'
	PARKER DRILLING COMPANY AND SUBSIDIARIES																					PARKER DRILLING COMPANY AND SUBSIDIARIES
	CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS																					CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS
	(Dollars in Thousands)																					(Dollars in Thousands)
	(Unaudited)																					(Unaudited)

																								Year ended December 31, 2012
			Three months ended September 30, 2013																					Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
			Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated			Total revenues		$	—			$	393,959			$	385,279			$	(101,256	)		$	677,982
	Total revenues		$	—			$	119,223			$	170,609			$	(52,070	)		$	237,762		Operating expenses			—				185,328				329,992				(101,256	)			414,064
	Operating expenses			—				64,297				141,514				(52,070	)			153,741		Depreciation and amortization			—				65,354				47,663				—				113,017
	Depreciation and amortization			—				19,956				15,926				—				35,882
																						Total operating gross margin			—				143,277				7,624				—				150,901
	Total operating gross margin			—				34,970				13,169				—				48,139
																						General and administration expense(1)			(182	)			(45,433	)			(437	)			—				(46,052	)
	General and administration expense(1)			(47	)			(14,028	)			(113	)			—				(14,188	)	Gain on disposition of assets, net			—				775				1,199				—				1,974
	Gain on disposition of assets, net			—				(34	)			1,128				—				1,094
																						Total operating income (loss)			(182	)			98,619				8,386				—				106,823
	Total operating income (loss)			(47	)			20,908				14,184				—				35,045
	Other income and (expense):																					Other income and (expense):
	Interest expense			(14,035	)			(107	)			(2,198	)			3,213				(13,127	)	Interest expense			(37,326	)			(151	)			(8,739	)			12,674				(33,542	)
	Interest income			360				250				2,733				(3,213	)			130		Changes in fair value of derivative positions			55				—				—				—				55
	Extinguishment of debt			(5,218	)			—				—				—				(5,218	)	Interest income			9,863				5,073				41,999				(56,782	)			153
	Changes in fair value of derivative positions			—				—				—				—				—		Loss on extinguishment of debt			(2,130	)			—				—				—				(2,130	)
	Other			(1	)			(11	)			412				—				400		Other			—				(370	)			(12	)			—				(382	)
	Equity in net earnings of subsidiaries			22,322				—				—				(22,322	)			—		Equity in net earnings of subsidiaries			43,884				—				—				(43,884	)			—

	Total other income (expense)			3,428				132				947				(22,322	)			(17,815	)	Total other income (expense)			14,346				4,552				33,248				(87,992	)			(35,846	)

	Income (benefit) before income taxes			3,381				21,040				15,131				(22,322	)			17,230		Income (benefit) before income taxes			14,164				103,171				41,634				(87,992	)			70,977
																						Income tax expense (benefit):
	Total income tax expense (benefit)			(4,589	)			10,223				3,478				—				9,112		Current			(25,406	)			32,781				10,667				—				18,042
																						Deferred			2,257				15,429				(1,849	)			—				15,837
	Net income (loss)			7,970				10,817				11,653				(22,322	)			8,118
																						Income tax expense (benefit)			(23,149	)			48,210				8,818				—				33,879
	Less: Net income (loss) attributable to noncontrolling interest			—				—				148				—				148
																						Net income (loss)			37,313				54,961				32,816				(87,992	)			37,098
	Net income (loss) attributable to controlling interest		$	7,970			$	10,817			$	11,505			$	(22,322	)		$	7,970
																						Less: Net (loss) attributable to noncontrolling interest			—				—				(215	)			—				(215	)

	-1	General and administration expenses for field operations are included in operating expenses.																				Net income (loss) attributable to controlling interest		$	37,313			$	54,961			$	33,031			$	(87,992	)		$	37,313

	PARKER DRILLING COMPANY AND SUBSIDIARIES																					-1	General and administration expenses for field operations are included in operating expenses.
	CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS																					PARKER DRILLING COMPANY AND SUBSIDIARIES
	(Dollars in Thousands)																					CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS
	(Unaudited)																					(Dollars in Thousands)
																						(Unaudited)

			Three Months Ended September 30, 2012																					Year ended December 31, 2011
			Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated					Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
	Total revenues		$	—			$	98,969			$	94,749			$	(28,417	)		$	165,301		Total revenues		$	—			$	376,229			$	426,491			$	(116,074	)		$	686,646
	Operating expenses			—				45,850				84,051				(28,417	)			101,484		Operating expenses			—				175,465				358,753				(116,074	)			418,144
	Depreciation and amortization			—				17,866				11,913				—				29,779		Depreciation and amortization			—				62,744				49,392				—				112,136

	Total operating gross margin			—				35,253				(1,215	)			—				34,038		Total operating gross margin			—				138,020				18,346				—				156,366

	General and administration expense(1)			(47	)			(8,823	)			(35	)			—				(8,905	)	General and administration expense(1)			(218	)			(30,859	)			(237	)			—				(31,314	)
	Gain on disposition of assets, net			—				553				53				—				606		Impairment and other charges			—				(170,000	)			—				—				(170,000	)
																						Provision for reduction in carrying value of certain assets			—				(1,350	)			—				—				(1,350	)
	Total operating income (loss)			(47	)			26,983				(1,197	)			—				25,739		Gain on disposition of assets, net			—				2,706				953				—				3,659
	Other income and (expense):
	Interest expense			(9,105	)			(43	)			(1,840	)			2,817				(8,171	)	Total operating income (loss)			(218	)			(61,483	)			19,062				—				(42,639	)
	Interest income			95				179				2,573				(2,817	)			30
	Changes in fair value of derivative positions			19				—				—				—				19		Other income and (expense):
Loss on extinguishment of debt			(117	)			—				—				—				(117	)	Interest expense			(26,654	)			(17,889	)			(8,865	)			30,814				(22,594	)
Other			—				26				—				—				26		Changes in fair value of derivative positions			(110	)			—				—				—				(110	)
Equity in net earnings of subsidiaries			10,596				—				—				(10,596	)			—		Interest income			18,131				750				12,189				(30,814	)			256
																					Other			—				(345	)			20				—				(325	)
Total other income (expense)			1,488				162				733				(10,596	)			(8,213	)	Equity in net earnings of subsidiaries			(23,484	)			—				—				23,484				—

Income (loss) before income taxes			1,441				27,145				(464	)			(10,596	)			17,526		Total other income and (expense)			(32,117	)			(17,484	)			3,344				23,484				(22,773	)

Income tax expense (benefit)			(9,495	)			10,451				5,739				—				6,695		Income (benefit) before income taxes			(32,335	)			(78,967	)			22,406				23,484				(65,412	)
																					Income tax expense (benefit):
Net income (loss)			10,936				16,694				(6,203	)			(10,596	)			10,831		Current			(13,402	)			27,169				19,841				—				33,608
																					Deferred			31,518				(57,030	)			(22,863	)			—				(48,375	)
Less: Net income (loss) attributable to noncontrolling interest			—				—				(105	)			—				(105	)
																					Total income tax expense (benefit)			18,116				(29,861	)			(3,022	)			—				(14,767	)
Net income (loss) attributable to controlling interest		$	10,936			$	16,694			$	(6,098	)		$	(10,596	)		$	10,936
																					Net income (loss)			(50,451	)			(49,106	)			25,428				23,484				(50,645	)

-1	General and administration expenses for field operations are included in operating expenses.																				Less: Net (loss) attributable to noncontrolling interest			—				—				(194	)			—				(194	)

PARKER DRILLING COMPANY AND SUBSIDIARIES																					Net income (loss) attributable to controlling interest		$	(50,451	)		$	(49,106	)		$	25,622			$	23,484			$	(50,451	)
CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS
(Dollars in Thousands)																					-1	General and administration expenses for field operations are included in operating expenses.
(Unaudited)																					PARKER DRILLING COMPANY AND SUBSIDIARIES
																					CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS
																					(Dollars in Thousands)
		Nine Months Ended September 30, 2013																			(Unaudited)
		Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
Total revenues		$	—			$	345,434			$	388,912			$	(103,428	)		$	630,918				Twelve months ended December 31, 2010
Operating expenses			—				186,708				331,056				(103,428	)			414,336				Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
Depreciation and amortization			—				57,335				40,339				—				97,674		Total revenues		$	—			$	366,947			$	401,617			$	(109,089	)		$	659,475
																					Operating expenses			—				237,584				342,783				(109,089	)			471,278
Total operating gross margin			—				101,391				17,517				—				118,908		Depreciation and amortization			—				63,402				51,628				—				115,030

General and administration expense(1)			(140	)			(48,942	)			(367	)			—				(49,449	)	Total operating gross margin			—				65,961				7,206				—				73,167
Gain on disposition of assets, net			—				1,917				842				—				2,759
																					General and administration expense(1)			(225	)			(30,193	)			(310	)			—				(30,728	)
Total operating income (loss)			(140	)			54,366				17,992				—				72,218		Provision for reduction in carrying value of certain assets			—				(1,952	)			—				—				(1,952	)
Other income and (expense):																					Gain on disposition of assets, net			—				2,067				2,553				—				4,620
Interest expense			(36,734	)			(167	)			(9,494	)			12,521				(33,874	)
Interest income			3,366				1,584				9,963				(12,521	)			2,392		Total operating income (loss)			(225	)			35,883				9,449				—				45,107
Extinguishment of debt			(5,218	)			—				—				—				(5,218	)
Changes in fair value of derivative positions			54				—				—				—				54		Other income and (expense):
Other			—				(178	)			511				—				333		Interest expense			(30,771	)			(35,640	)			(16,185	)			55,791				(26,805	)
Equity in net earnings of subsidiaries			36,330				—				—				(36,330	)			—		Interest income			42,000				757				23,291				(65,791	)			257
																					Loss on extinguishment of debt			(7,209	)			—				—				—				(7,209	)
Total other income (expense)			(2,202	)			1,239				980				(36,330	)			(36,313	)	Other			—				88				67				—				155
																					Equity in net earnings of subsidiaries			(22,962	)			—				—				22,962				—
Income (loss) before income taxes			(2,342	)			55,605				18,972				(36,330	)			35,905
																					Total other income and (expense)			(18,942	)			(34,795	)			7,173				12,962				(33,602	)
Total Income tax expense (benefit)			(19,185	)			27,993				10,033				—				18,841
																					Income (benefit) before income taxes			(19,167	)			1,088				16,622				12,962				11,505
Net income (loss)			16,843				27,612				8,939				(36,330	)			17,064		Income tax expense (benefit):
																					Current			139				(189	)			27,571				—				27,521
Less: Net income (loss) attributable to noncontrolling interest			—				—				221				—				221		Deferred			(4,845	)			2,323				1,214				—				(1,308	)

Net income (loss) attributable to controlling interest		$	16,843			$	27,612			$	8,718			$	(36,330	)		$	16,843		Total income tax expense (benefit)			(4,706	)			2,134				28,785				—				26,213

																					Net income (loss)			(14,461	)			(1,046	)			(12,163	)			12,962				(14,708	)
-1	General and administration expenses for field operations are included in operating expenses.
																					Less: Net (loss) attributable to noncontrolling interest			—				—				(247	)			—				(247	)
PARKER DRILLING COMPANY AND SUBSIDIARIES
CONSOLIDATING CONDENSED STATEMENT OF OPERATIONS																					Net income (loss) attributable to controlling interest		$	(14,461	)		$	(1,046	)		$	(11,916	)		$	12,962			$	(14,461	)
(Dollars in Thousands)
(Unaudited)																					-1	General and administration expenses for field operations are included in operating expenses.


		Nine Months Ended September 30, 2012
		Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
Total revenues		$	—			$	302,892			$	295,811			$	(77,908	)		$	520,795
Operating expenses			—				136,849				242,001				(77,908	)			300,942
Depreciation and amortization			—				49,127				36,230				—				85,357

Total operating gross margin			—				116,916				17,580				—				134,496

General and administration expense(1)			(137	)			(21,273	)			(412	)			—				(21,822	)
Gain on disposition of assets, net			—				1,168				1,298				—				2,466

Total operating income (loss)			(137	)			96,811				18,466				—				115,140
Other income and (expense):
Interest expense			(27,923	)			(115	)			(5,811	)			8,716				(25,133	)
Interest income			8,695				4,894				39,345				(52,825	)			109
Changes in fair value of derivative positions			8				—				—				—				8
Loss on extinguishment of debt			(1,766	)			—				—				—				(1,766	)
Other			—				64				(2	)			—				62
Equity in net earnings of subsidiaries			61,553				—				—				(61,553	)			—

Total other income (expense)			40,567				4,843				33,532				(105,662	)			(26,720	)

Income (loss) before income taxes			40,430				101,654				51,998				(105,662	)			88,420

Income tax expense (benefit)			(16,981	)			38,149				9,987				—				31,155

Net income (loss)			57,411				63,505				42,011				(105,662	)			57,265

Less: Net income (loss) attributable to noncontrolling interest			—				—				(146	)			—				(146	)

Net income (loss) attributable to controlling interest		$	57,411			$	63,505			$	42,157			$	(105,662	)		$	57,411


-1	General and administration expenses for field operations are included in operating expenses.
Consolidating Condensed Balance Sheet	'																					'
	PARKER DRILLING COMPANY AND SUBSIDIARIES																					PARKER DRILLING COMPANY AND SUBSIDIARIES
	CONSOLIDATING CONDENSED BALANCE SHEET																					CONSOLIDATING CONDENSED BALANCE SHEET
	(Dollars in Thousands)																					(Dollars in Thousands)
	(Unaudited)																					(Unaudited)

																								31-Dec-12
			September 30, 2013																					Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
			Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated			ASSETS
	ASSETS																					Current assets:
	Current assets:																					Cash and cash equivalents		$	42,251			$	11,023			$	34,612			$	—			$	87,886
	Cash and cash equivalents		$	89,516			$	21,273			$	51,668			$	—			$	162,457		Accounts and notes receivable, net			289,957				98,747				292,644				(512,786	)			168,562
	Accounts and notes receivable, net			290,856				113,873				386,521				(541,627	)			249,623		Rig materials and supplies			—				2,834				26,026				—				28,860
	Rig materials and supplies			—				2,364				37,838				—				40,202		Deferred costs			—				—				1,089				—				1,089
	Deferred costs			—				32				13,551				—				13,583		Deferred income taxes			—				7,615				1,127				—				8,742
	Deferred income taxes			—				12,363				1,110				—				13,473		Other tax assets			46,249				(31,136	)			18,411				—				33,524
	Other tax assets			43,171				(46,939	)			22,201				—				18,433		Assets held for sale			—				—				11,550				—				11,550
	Assets held for sale			—				1,183				6,302				—				7,485		Other current assets			—				8,675				4,146				—				12,821
	Other current assets			—				14,238				6,668				—				20,906
																						Total current assets			378,457				97,758				389,605				(512,786	)			353,034
	Total current assets			423,543				118,387				525,859				(541,627	)			526,162
																						Property, plant and equipment, net			60				548,794				237,304				—				786,158
	Property, plant and equipment, net			60				559,885				298,727				—				858,672		Investment in subsidiaries and intercompany advances			780,878				(233,388	)			1,467,429				(2,014,919	)			—
	Investment in subsidiaries and intercompany advances			944,584				(220,110	)			1,593,743				(2,318,217	)			—		Other noncurrent assets			43,569				59,541				13,431				—				116,541
	Other noncurrent assets			52,147				60,002				38,397				—				150,546
																						Total assets		$	1,202,964			$	472,705			$	2,107,769			$	(2,527,705	)		$	1,255,733
	Total assets		$	1,420,334			$	518,164			$	2,456,726			$	(2,859,844	)		$	1,535,380
																						LIABILITIES AND STOCKHOLDERS’ EQUITY
	LIABILITIES AND STOCKHOLDERS’ EQUITY																					Current liabilities:
	Current liabilities:																					Current portion of long-term debt		$	10,000			$	—			$	—			$	—			$	10,000
	Current portion of long-term debt		$	—			$	—			$	—			$	—			$	—		Accounts payable and accrued liabilities			65,839				93,243				205,864				(227,200	)			137,746
	Accounts payable and accrued liabilities			81,524				101,207				263,709				(255,211	)			191,229		Accrued income taxes			—				612				3,508				—				4,120
	Accrued income taxes			—				529				6,732				—				7,261
																						Total current liabilities			75,839				93,855				209,372				(227,200	)			151,866
	Total current liabilities			81,524				101,736				270,441				(255,211	)			198,490
																						Long-term debt			469,205				—				—				—				469,205
	Long-term debt			653,968				—				—				—				653,968		Other long-term liabilities			3,933				6,129				13,120				—				23,182
	Other long-term liabilities			4,289				5,806				13,953				—				24,048		Long-term deferred tax liability			—				36,894				(16,047	)			—				20,847
	Long-term deferred tax liability			—				47,684				(8,600	)			—				39,084		Intercompany payables			62,583				43,657				216,320				(322,560	)			—
	Intercompany payables			62,584				43,669				359,106				(465,359	)			—		Contingencies			—				—				—				—				—
	Contingencies			—				—				—				—				—		Stockholders’ equity:
	Stockholders’ equity:																					Common stock			19,818				18,049				43,003				(61,052	)			19,818
	Common stock			20,050				18,049				43,003				(61,052	)			20,050		Capital in excess of par value			646,217				733,112				1,455,246				(2,188,358	)			646,217
	Capital in excess of par value			654,750				733,899				1,579,458				(2,313,357	)			654,750		Retained earnings (accumulated deficit)			(74,631	)			(458,991	)			187,526				271,465				(74,631	)
	Accumulated other comprehensive income			—				—				957				—				957
	Retained earnings (accumulated deficit)			(56,831	)			(432,679	)			196,587				235,135				(57,788	)	Total controlling interest stockholders’ equity			591,404				292,170				1,685,775				(1,977,945	)			591,404

	Total controlling interest stockholders’ equity			617,969				319,269				1,820,005				(2,139,274	)			617,969		Noncontrolling interest			—				—				(771	)			—				(771	)

	Noncontrolling interest			—				—				1,821				—				1,821		Total Equity			591,404				292,170				1,685,004				(1,977,945	)			590,633

	Total equity			617,969				319,269				1,821,826				(2,139,274	)			619,790		Total liabilities and stockholders’ equity		$	1,202,964			$	472,705			$	2,107,769			$	(2,527,705	)		$	1,255,733

	Total liabilities and stockholders’ equity		$	1,420,334			$	518,164			$	2,456,726			$	(2,859,844	)		$	1,535,380		PARKER DRILLING COMPANY AND SUBSIDIARIES
																						CONSOLIDATING CONDENSED BALANCE SHEET
																						(Dollars in Thousands)
	PARKER DRILLING COMPANY AND SUBSIDIARIES																					(Unaudited)
	CONSOLIDATING CONDENSED BALANCE SHEET
	(Dollars in Thousands)																							31-Dec-11
	(Unaudited)																							Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
																						ASSETS
																						Current assets:
			December 31, 2012																			Cash and cash equivalents		$	55,670			$	4,212			$	37,987			$	—			$	97,869
			Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated			Accounts and notes receivable, net			289,512				94,748				285,326				(485,663	)			183,923
ASSETS																					Rig materials and supplies			—				762				29,185				—				29,947
Current assets:																					Deferred costs			—				—				3,249				—				3,249
Cash and cash equivalents		$	42,251			$	11,023			$	34,612			$	—			$	87,886		Deferred income taxes			—				5,311				853				486				6,650
Accounts and notes receivable, net			289,957				98,747				292,644				(512,786	)			168,562		Other tax assets			47,834				(25,218	)			2,742				—				25,358
Rig materials and supplies			—				2,834				26,026				—				28,860		Assets held for sale			—				—				5,315				—				5,315
Deferred costs			—				—				1,089				—				1,089		Other current assets			788				6,381				8,133				—				15,302
Deferred income taxes			—				7,615				1,127				—				8,742
Other tax assets			46,249				(31,136	)			18,411				—				33,524		Total current assets			393,804				86,196				372,790				(485,177	)			367,613
Assets held for sale			—				—				6,800				—				6,800
Other current assets			—				8,675				4,146				—				12,821		Property, plant and equipment, net			79				474,942				244,787				1				719,809
																					Investment in subsidiaries and intercompany advances			720,214				(212,883	)			1,347,719				(1,855,050	)			—
Total current assets			378,457				97,758				384,855				(512,786	)			348,284		Other noncurrent assets			44,962				66,660				16,839				363				128,824

Property, plant and equipment, net			60				548,794				240,269				—				789,123		Total assets		$	1,159,059			$	414,915			$	1,982,135			$	(2,339,863	)		$	1,216,246
Investment in subsidiaries and intercompany advances			780,878				(233,388	)			1,467,429				(2,014,919	)			—
Other noncurrent assets			43,569				59,541				15,216				—				118,326		LIABILITIES AND STOCKHOLDERS’ EQUITY
																					Current liabilities:
Total assets		$	1,202,964			$	472,705			$	2,107,769			$	(2,527,705	)		$	1,255,733		Current portion of long-term debt		$	145,723			$	—			$	—			$	—			$	145,723
																					Accounts payable and accrued liabilities			60,120				94,056				181,010				(199,936	)			135,250
LIABILITIES AND STOCKHOLDERS’ EQUITY																					Accrued income taxes			(205	)			921				4,121				—				4,837
Current liabilities:
Current portion of long-term debt		$	10,000			$	—			$	—			$	—			$	10,000		Total current liabilities			205,638				94,977				185,131				(199,936	)			285,810
Accounts payable and accrued liabilities			65,839				93,243				205,864				(227,200	)			137,746
Accrued income taxes			—				612				3,508				—				4,120		Long-term debt			337,000				—				—				—				337,000
																					Other long-term liabilities			8,081				9,474				15,897				—				33,452
Total current liabilities			75,839				93,855				209,372				(227,200	)			151,866		Long-term deferred tax liability			1,151				25,232				(11,296	)			847				15,934
																					Intercompany payables			62,583				43,657				111,619				(217,859	)			—
Long-term debt			469,205				—				—				—				469,205		Contingencies			—				—				—				—				—
Other long-term liabilities			3,933				6,129				13,120				—				23,182		Stockholders’ equity:
Long-term deferred tax liability			—				36,894				(16,047	)			—				20,847		Common stock			19,508				18,049				43,003				(61,052	)			19,508
Intercompany payables			62,583				43,657				216,320				(322,560	)			—		Capital in excess of par value			637,042				733,120				1,444,091				(2,177,211	)			637,042
Contingencies			—				—				—				—				—		Retained earnings (accumulated deficit)			(111,944	)			(509,594	)			194,246				315,348				(111,944	)
Stockholders’ equity:
Common stock			19,818				18,049				43,003				(61,052	)			19,818		Total controlling interest stockholders’ equity			544,606				241,575				1,681,340				(1,922,915	)			544,606
Capital in excess of par value			646,217				733,112				1,455,246				(2,188,358	)			646,217
Accumulated other comprehensive income			—				—				—				—				—		Noncontrolling interest			—				—				(556	)			—				(556	)
Retained earnings (accumulated deficit)			(74,631	)			(458,991	)			187,526				271,465				(74,631	)
																					Total Equity			544,606				241,575				1,680,784				(1,922,915	)			544,050
Total controlling interest stockholders’ equity			591,404				292,170				1,685,775				(1,977,945	)			591,404
																					Total liabilities and stockholders’ equity		$	1,159,059			$	414,915			$	1,982,135			$	(2,339,863	)		$	1,216,246
Noncontrolling interest			—				—				(771	)			—				(771	)

Total Equity			591,404				292,170				1,685,004				(1,977,945	)			590,633

Total liabilities and stockholders’ equity		$	1,202,964			$	472,705			$	2,107,769			$	(2,527,705	)		$	1,255,733

Consolidated Condensed Statements of Cash Flows	'																					'
	PARKER DRILLING COMPANY AND SUBSIDIARIES																					PARKER DRILLING COMPANY AND SUBSIDIARIES
	CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS																					CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
	(Dollars in Thousands)																					(Dollars in Thousands)
	(Unaudited)																					(Unaudited)

																								Year Ended December 31, 2012
			Nine Months Ended September 30, 2013																					Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
			Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated			Cash flows from operating activities:
	Cash flows from operating activities:																					Net income (loss)		$	37,313			$	54,961			$	32,816			$	(87,992	)		$	37,098
	Net income (loss)		$	16,843			$	27,612			$	8,939			$	(36,330	)		$	17,064		Adjustments to reconcile net income (loss) to net cash provided by operating activities:
	Adjustments to reconcile net income (loss):																					Depreciation and amortization			—				65,354				47,663				—				113,017
	Depreciation and amortization			—				57,335				40,339				—				97,674		Loss on extinguishment of debt			2,130				—				—				—				2,130
	Loss on extinguishment of debt			5,218				—				—				—				5,218		Gain on disposition of assets			—				(775	)			(1,199	)			—				(1,974	)
	Gain on disposition of assets			—				(1,917	)			(842	)			—				(2,759	)	Deferred income tax expense			2,257				15,429				(1,849	)			—				15,837
	Deferred income tax expense			(2,860	)			10,479				5,253				—				12,872		Expenses not requiring cash			16,558				33,644				(27,602	)			—				22,600
	Expenses not requiring cash			10,494				591				(1,157	)			—				9,928		Equity in net earnings of subsidiaries			(43,884	)			—				—				43,884				—
	Equity in net earnings of subsidiaries			(36,330	)			—				—				36,330				—		Change in accounts receivable			(445	)			(1,788	)			17,474				—				15,241
	Change in accounts receivable			(899	)			(7,951	)			(19,755	)			—				(28,605	)	Change in other assets			1,649				2,060				(9,200	)			—				(5,491	)
	Change in accrued income taxes			358				(85	)			2,604				—				2,877		Change in accrued income taxes			(4,055	)			220				(2,267	)			—				(6,102	)
	Change in other assets			3,045				4,580				(8,971	)			—				(1,346	)	Change in liabilities			3,914				(4,158	)			(2,413	)			—				(2,657	)
	Change in liabilities			14,222				(2,116	)			306				—				12,412
																						Net cash provided by (used in) operating activities			15,437				164,947				53,423				(44,108	)			189,699
	Net cash provided by (used in) operating activities			10,091				88,528				26,716				—				125,335
																						Cash flows from investing activities:
	Cash flows from investing activities:																					Capital expenditures			—				(176,333	)			(15,210	)			—				(191,543	)
	Capital expenditures			—				(66,956	)			(35,900	)			—				(102,856	)	Proceeds from the sale of assets			—				2,062				1,875				—				3,937
	Proceeds from the sale of assets			—				2,751				2,782				—				5,533		Proceeds from insurance settlements			—				—				—				—				—
	Acquisition of ITS, net of cash acquired			—				(292	)			(117,699	)			—				(117,991	)	Intercompany dividend payment			(8,387	)			(4,357	)			(31,364	)			44,108				—

	Net cash (used in) investing activities			—				(64,497	)			(150,817	)			—				(215,314	)	Net cash (used in) investing activities			(8,387	)			(178,628	)			(44,699	)			44,108				(187,606	)

	Cash flows from financing activities:																					Cash flows from financing activities:
	Proceeds from debt issuance			350,000				—				—				—				350,000		Proceeds from debt issuance			130,000				—				—				—				130,000
	Repayments of long term debt			(125,000	)			—				—				—				(125,000	)	Proceeds from draw on revolver credit facility			7,000				—				—				—				7,000
	Paydown on term note			(50,000	)			—				—				—				(50,000	)	Paydown on senior notes			(125,000	)			—				—				—				(125,000	)
	Payment of debt issuance costs			(10,981	)			—				—				—				(10,981	)	Paydown on term note			(18,000	)			—				—				—				(18,000	)
	Excess tax benefit from stock-based compensation			531				—				—				—				531		Paydown on revolver credit facility			—				—				—				—				—
	Intercompany advances, net			(127,376	)			(13,781	)			141,157				—				—		Payment of debt issuance costs			(4,859	)			—				—				—				(4,859	)
																						Payment of debt extinguishment costs			(555	)			—				—				—				(555	)
	Net cash provided by (used in) financing activities			37,174				(13,781	)			141,157				—				164,550		Proceeds from stock options exercised			—				—				—				—				—
																						Excess tax benefit from stock-based compensation			(662	)			—				—				—				(662	)
	Net change in cash and cash equivalents			47,265				10,250				17,056				—				74,571		Intercompany advances, net			(8,393	)			20,492				(12,099	)			—				—
	Cash and cash equivalents at beginning of year			42,251				11,023				34,612				—				87,886
																						Net cash provided by (used in) financing activities			(20,469	)			20,492				(12,099	)			—				(12,076	)
	Cash and cash equivalents at end of year		$	89,516			$	21,273			$	51,668			$	—			$	162,457
																						Net change in cash and cash equivalents			(13,419	)			6,811				(3,375	)			—				(9,983	)
																						Cash and cash equivalents at beginning of year			55,670				4,212				37,987				—				97,869
	PARKER DRILLING COMPANY AND SUBSIDIARIES
	CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS																					Cash and cash equivalents at end of year		$	42,251			$	11,023			$	34,612			$	—			$	87,886
	(Dollars in Thousands)
	(Unaudited)																					See accompanying notes to unaudited consolidated condensed financial statements.
																						PARKER DRILLING COMPANY AND SUBSIDIARIES
																						CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
			Nine Months Ended September 30, 2012																			(Dollars in Thousands)
			Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated			(Unaudited)
	Cash flows from operating activities:
	Net income (loss)		$	57,411			$	63,505			$	42,011			$	(105,662	)		$	57,265				Year Ended December 31, 2011
	Adjustments to reconcile net income (loss)to net cash provided by operating activities:																							Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
	Depreciation and amortization			—				49,127				36,230				—				85,357		Cash flows from operating activities:
	Loss on extinguishment of debt			1,766				—				—				—				1,766		Net income (loss)		$	(50,451	)		$	(49,106	)		$	25,428			$	23,484			$	(50,645	)
	Gain on disposition of assets			—				(1,168	)			(1,298	)			—				(2,466	)	Adjustments to reconcile net income (loss)to net cash provided by operating activities:
	Deferred income tax expense			5,940				4,868				(2,405	)			—				8,403		Depreciation and amortization			—				62,744				49,392				—				112,136
	Expenses not requiring cash			13,264				689				1,770				1				15,724		Loss on extinguishment of debt			—				—				—				—				—
Equity in net earnings of subsidiaries			(61,553	)			—				—				61,553				—		Gain on disposition of assets			—				(2,706	)			(953	)			—				(3,659	)
Change in accounts receivable			(291	)			766				24,173				—				24,648		Deferred income tax expense			31,518				(57,030	)			(22,863	)			—				(48,375	)
Change in other assets			(32,874	)			61,320				(27,882	)			—				564		Impairment and other charges			—				170,000				—				—				170,000
Change in accrued income taxes			(5,068	)			1,832				187				—				(3,049	)	Provision for reduction in carrying value of certain assets			—				1,350				—				—				1,350
Change in liabilities			12,917				(21,430	)			(1,672	)			—				(10,185	)	Expenses not requiring cash			16,411				376				(3,954	)			—				12,833
																					Equity in net earnings of subsidiaries			23,484				—				—				(23,484	)			—
Net cash provided by (used in) operating activities			(8,488	)			159,509				71,114				(44,108	)			178,027		Change in accounts receivable			(288,333	)			347,344				(65,852	)			—				(6,841	)
																					Change in other assets			62,173				(16,724	)			16,404				—				61,853
Cash flows from investing activities:																					Change in liabilities			(10,454	)			(53,404	)			41,091				—				(22,767	)
Capital expenditures			—				(139,618	)			(8,040	)			—				(147,658	)
Proceeds from the sale of assets			—				1,667				1,829				—				3,496		Net cash provided by (used in) operating activities			(215,652	)			402,844				38,693				—				225,885
Intercompany dividend payment			(8,387	)			(4,357	)			(31,364	)			44,108				—
																					Cash flows from investing activities:
Net cash (used in) investing activities			(8,387	)			(142,308	)			(37,575	)			44,108				(144,162	)	Capital expenditures			—				(174,999	)			(15,400	)			—				(190,399	)
																					Proceeds from the sale of assets			—				4,335				1,200				—				5,535
Cash flows from financing activities:																					Proceeds from insurance settlements			—				250				—				—				250
Proceeds from debt issuance			130,000				—				—				—				130,000		Intercompany dividend payment			—				—				—				—				—
Repayments of senior notes			(125,000	)			—				—				—				(125,000	)
Paydown on term note			(18,000	)			—				—				—				(18,000	)	Net cash provided by (used in) investing activities			—				(170,414	)			(14,200	)			—				(184,614	)
Payment of debt issuance costs			(3,516	)			—				—				—				(3,516	)
Payment of debt extinguishment costs			(519	)			—				—				—				(519	)	Cash flows from financing activities:
Excess tax benefit from stock-based compensation			(572	)			—				—				—				(572	)	Proceeds from debt issuance			50,000				—				—				—				50,000
Intercompany advances, net			56,280				(13,507	)			(42,773	)			—				—		Proceeds from draw on revolver credit facility			—				—				—				—				—
																					Paydown on senior notes			—				—				—				—				—
Net cash provided by (used in) financing activities			38,673				(13,507	)			(42,773	)			—				(17,607	)	Paydown on term note			(21,000	)			—				—				—				(21,000	)
																					Paydown on revolver credit facility			(25,000	)			—				—				—				(25,000	)
Net change in cash and cash equivalents			21,798				3,694				(9,234	)			—				16,258		Payment of debt issuance costs			(504	)			—				—				—				(504	)
Cash and cash equivalents at beginning of year			55,670				4,212				37,987				—				97,869		Payment of debt extinguishment costs			—				—				—				—				—
																					Proceeds from stock options exercised			183				—				—				—				183
Cash and cash equivalents at end of year		$	77,468			$	7,906			$	28,753			$	—			$	114,127		Excess tax benefit from stock-based compensation			1,488				—				—				—				1,488
																					Intercompany advances, net			252,320				(230,535	)			(21,785	)			—				—

																					Net cash provided by (used in) financing activities			257,487				(230,535	)			(21,785	)			—				5,167

																					Net change in cash and cash equivalents			41,835				1,895				2,708				—				46,438
																					Cash and cash equivalents at beginning of year			13,835				2,317				35,279				—				51,431

																					Cash and cash equivalents at end of year		$	55,670			$	4,212			$	37,987			$	—			$	97,869

																					See accompanying notes to unaudited consolidated condensed financial statements.
																					PARKER DRILLING COMPANY AND SUBSIDIARIES
																					CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
																					(Dollars in Thousands)
																					(Unaudited)

																							Year Ended December 31, 2010
																							Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
																					Cash flows from operating activities:
																					Net income (loss)		$	(14,461	)		$	(1,046	)		$	(12,163	)		$	12,962			$	(14,708	)
																					Adjustments to reconcile net income (loss) to net cash provided by operating activities:
																					Depreciation and amortization			—				63,402				51,628				—				115,030
																					Loss on extinguishment of debt			7,209				—				—				—				7,209
																					Gain on disposition of assets			—				(2,067	)			(2,553	)			—				(4,620	)
																					Deferred income tax expense			(4,845	)			2,323				1,214				—				(1,308	)
																					Provision for reduction in carrying value of certain assets			—				1,952				—				—				1,952
																					Expenses not requiring cash			14,829				—				—				—				14,829
																					Equity in net earnings of subsidiaries			22,962				—				—				(22,962	)			—
																					Change in accounts receivable			16,178				(14,763	)			19,337				—				20,752
																					Change in other assets			(2,505	)			(13,454	)			15,365				—				(594	)
																					Change in liabilities			(144	)			7,793				(22,641	)			—				(14,992	)

																					Net cash provided by (used in) operating activities			39,223				44,140				50,187				(10,000	)			123,550

																					Cash flows from investing activities:
																					Capital expenditures			—				(169,784	)			(49,400	)			—				(219,184	)
																					Proceeds from the sale of assets			—				4,646				1,829				—				6,475
																					Intercompany dividend payment			—				—				(10,000	)			10,000				—

																					Net cash provided by (used in) investing activities			—				(165,138	)			(57,571	)			10,000				(212,709	)

																					Cash flows from financing activities:
																					Proceeds from debt issuance			300,000				—				—				—				300,000
																					Proceeds from draw on revolver credit facility			25,000				—				—				—				25,000
																					Paydown on senior notes			(225,000	)			—				—				—				(225,000	)
																					Paydown on term note			(12,000	)			—				—				—				(12,000	)
																					Paydown on revolver credit facility			(42,000	)			—				—				—				(42,000	)
																					Payment of debt issuance costs			(7,976	)			—				—				—				(7,976	)
																					Payment of debt extinguishment costs			(7,466	)			—				—				—				(7,466	)
																					Proceeds from stock options exercised			26				—				—				—				26
																					Excess tax benefit from stock-based compensation			1,203				—				—				—				1,203
																					Intercompany advances, net			(115,364	)			121,547				(6,183	)			—				—

																					Net cash provided by (used in) financing activities			(83,577	)			121,547				(6,183	)			—				31,787

																					Net change in cash and cash equivalents			(44,354	)			549				(13,567	)			—				(57,372	)
																					Cash and cash equivalents at beginning of year			58,189				1,768				48,846				—				108,803

																					Cash and cash equivalents at end of year		$	13,835			$	2,317			$	35,279			$	—			$	51,431

																					See accompanying notes to unaudited consolidated condensed financial statements.
																					Note 17 — Selected Quarterly Financial Data

																							Quarter
																					Year 2012		First				Second				Third				Fourth				Total
																							(Dollars in Thousands Except Per Share Amounts)
																							(Unaudited)
																					Revenues		$	176,569			$	178,925			$	165,301			$	157,187			$	677,982
																					Operating gross margin(2)		$	54,018			$	46,440			$	34,038			$	16,405			$	150,901
																					Operating income		$	49,013			$	40,388			$	25,739			$	(8,317	)		$	106,823
																					Net income (loss) attributable to controlling interest		$	26,392			$	20,083			$	10,936			$	(20,098	)		$	37,313
																					Basic earnings per share — net income (loss)(1)		$	0.23			$	0.17			$	0.09			$	(0.17	)		$	0.32
																					Diluted earnings per share — net income (loss)(1)		$	0.22			$	0.17			$	0.09			$	(0.17	)		$	0.31

																							Quarter
																					Year 2011		First				Second				Third				Fourth				Total
																							(Dollars in Thousands Except Per Share Amounts)
																							(Unaudited)
																					Revenues		$	156,179			$	172,812			$	176,589			$	181,066			$	686,646
																					Operating gross margin(2)		$	21,204			$	40,797			$	49,966			$	44,399			$	156,366
																					Operating income		$	15,402			$	33,215			$	41,959			$	(133,215	)		$	(42,639	)
																					Net income (loss) attributable to controlling interest		$	4,827			$	14,173			$	20,725			$	(90,176	)		$	(50,451	)
																					Basic earnings per share — net income (loss)(1)		$	0.04			$	0.12			$	0.18			$	(0.77	)		$	(0.43	)
																					Diluted earnings per share — net income (loss)(1)		$	0.04			$	0.12			$	0.18			$	(0.77	)		$	(0.43	)
																					1)	As a result of shares issued during the year, earnings per share for each of the year’s four quarters, which are based on weighted average shares outstanding during each quarter, may not equal the annual earnings per share, which is based on the weighted average shares outstanding during the year. Additionally, as a result of rounding to the thousands, revenues, operating gross margin, operating income, and net income (loss) attributable to controlling interest may not equal the 2012 year to date results.
																					2)	As the Company modified our reporting segments to be consistent with recent organizational changes to improve our drilling organization, expenses related to our U.S. Barge Drilling segment were found to be incorrectly included in our general and administrative expense during the first through third quarters of the current year. These expenses have been appropriately reclassified to be included as part of the segment operating expenses, therefore our operating gross margin for each of the first three quarters will not agree to the respective 10-Q reports for the current year only.
Consolidating Condensed Statements of Comprehensive Income (Loss)	'																					'
	PARKER DRILLING COMPANY AND SUBSIDIARIES
	CONSOLIDATING CONDENSED STATEMENT OF COMPREHENSIVE INCOME (LOSS)
	(Dollars in Thousands)
	(Unaudited)


			Three Months Ended September 30, 2013
			Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
	Comprehensive income:
	Net income		$	7,970			$	10,817			$	11,653			$	(22,322	)		$	8,118
	Other comprehensive gain, net of tax:
	Currency translation difference on related borrowings			—				—				(577	)			—				(577	)
	Currency translation difference on foreign currency net investments											2,098								2,098

	Total other comprehensive gain, net of tax:			—				—				1,521				—				1,521

	Comprehensive income			7,970				10,817				13,174				(22,322	)			9,639
	Comprehensive (income) attributable to noncontrolling interest			—				—				(53	)			—				(53	)

	Comprehensive income attributable to controlling interest		$	7,970			$	10,817			$	13,121			$	(22,322	)		$	9,586

	PARKER DRILLING COMPANY AND SUBSIDIARIES
	CONSOLIDATING CONDENSED STATEMENT OF COMPREHENSIVE INCOME (LOSS)
	(Dollars in Thousands)
	(Unaudited)


			Nine Months Ended September 30, 2013
			Parent				Guarantor				Non-Guarantor				Eliminations				Consolidated
	Comprehensive income:
	Net income		$	16,843			$	27,612			$	8,939			$	(36,330	)		$	17,064
	Other comprehensive gain, net of tax:
	Currency translation difference on related borrowings			—				—				(1,542	)			—				(1,542	)
	Currency translation difference on foreign currency net investments											2,499								2,499

	Total other comprehensive gain, net of tax:			—				—				957				—				957

	Comprehensive income			16,843				27,612				9,896				(36,330	)			18,021
	Comprehensive (income) attributable to noncontrolling interest			—				—				(83	)			—				(83	)

	Comprehensive income attributable to controlling interest		$	16,843			$	27,612			$	9,813			$	(36,330	)		$	17,938

Selected_Quarterly_Financial_D1

Selected Quarterly Financial Data (Tables)	12 Months Ended
Selected Quarterly Financial Data (Tables)	Dec. 31, 2012
Schedule of Selected Quarterly Financial Data	'

			Quarter
	Year 2012		First		Second		Third		Fourth			Total
			(Dollars in Thousands Except Per Share Amounts)
			(Unaudited)
	Revenues		$	176,569	$	178,925	$	165,301	$	157,187		$	677,982
	Operating gross margin(2)		$	54,018	$	46,440	$	34,038	$	16,405		$	150,901
	Operating income		$	49,013	$	40,388	$	25,739	$	(8,317	)	$	106,823
	Net income (loss) attributable to controlling interest		$	26,392	$	20,083	$	10,936	$	(20,098	)	$	37,313
	Basic earnings per share — net income (loss)(1)		$	0.23	$	0.17	$	0.09	$	(0.17	)	$	0.32
	Diluted earnings per share — net income (loss)(1)		$	0.22	$	0.17	$	0.09	$	(0.17	)	$	0.31

			Quarter
	Year 2011		First		Second		Third		Fourth			Total
			(Dollars in Thousands Except Per Share Amounts)
			(Unaudited)
	Revenues		$	156,179	$	172,812	$	176,589	$	181,066		$	686,646
	Operating gross margin(2)		$	21,204	$	40,797	$	49,966	$	44,399		$	156,366
	Operating income		$	15,402	$	33,215	$	41,959	$	(133,215	)	$	(42,639	)
	Net income (loss) attributable to controlling interest		$	4,827	$	14,173	$	20,725	$	(90,176	)	$	(50,451	)
	Basic earnings per share — net income (loss)(1)		$	0.04	$	0.12	$	0.18	$	(0.77	)	$	(0.43	)
	Diluted earnings per share — net income (loss)(1)		$	0.04	$	0.12	$	0.18	$	(0.77	)	$	(0.43	)

	1)	As a result of shares issued during the year, earnings per share for each of the year’s four quarters, which are based on weighted average shares outstanding during each quarter, may not equal the annual earnings per share, which is based on the weighted average shares outstanding during the year. Additionally, as a result of rounding to the thousands, revenues, operating gross margin, operating income, and net income (loss) attributable to controlling interest may not equal the 2012 year to date results.
	2)	As the Company modified our reporting segments to be consistent with recent organizational changes to improve our drilling organization, expenses related to our U.S. Barge Drilling segment were found to be incorrectly included in our general and administrative expense during the first through third quarters of the current year. These expenses have been appropriately reclassified to be included as part of the segment operating expenses, therefore our operating gross margin for each of the first three quarters will not agree to the respective 10-Q reports for the current year only.

Subsequent_Events_Tables

Subsequent Events (Tables)	12 Months Ended
Subsequent Events (Tables)	Dec. 31, 2012
SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS	'

	SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS
	(Dollars in Thousands)

	Classifications	Balance at		Charged			Charged			Deductions			Balance
		beginning		to cost and			to other						at end of
		of year		expenses			accounts						year
	Year ended December 31, 2012
	Allowance for doubtful accounts and notes	$	1,544	$	4,264		$	3,195		$	(886	)	$	8,117
	Allowance for obsolete rig materials and supplies	$	316		—		$	—		$	(4	)	$	312
	Deferred tax valuation allowance	$	6,467	$	(1,662	)	$	—		$	—		$	4,805
	Year ended December 31, 2011
	Allowance for doubtful accounts and notes	$	7,020	$	2,258		$	(2,034	)	$	(5,700	)	$	1,544
	Allowance for obsolete rig materials and supplies	$	309	$	26		$	—		$	(19	)	$	316
	Deferred tax valuation allowance	$	5,532	$	2,542		$	(1,607	)	$	—		$	6,467
	Year ended December 31, 2010
	Allowance for doubtful accounts and notes	$	4,095	$	3,244		$	(211	)	$	(108	)	$	7,020
	Allowance for obsolete rig materials and supplies	$	—	$	309		$	—		$	—		$	309
	Deferred tax valuation allowance	$	5,194	$	338		$	—		$	—		$	5,532

Acquisition_of_ITS_Tables

Acquisition of ITS (Tables)	9 Months Ended
Acquisition of ITS (Tables)	Sep. 30, 2013
Schedule of Business Acquisition	'
	The following details the fair value of the consideration transferred to effect the ITS Acquisition (dollars in thousands).


	Cash paid to, or on behalf of, ITS and its equity holders		$	101,000
	Cash deposited in escrow			19,000
	Fair value of contingent consideration deposited in escrow for assets not acquired(1)			5,000

	Total fair value of the consideration transferred		$	125,000


		-1	Based on the terms of the Agreement, $5.0 million of the $24.0 million in escrow to be paid to the seller is contingent upon certain future liabilities that could become due by ITS in certain jurisdictions. Any payments in relation to these liabilities will be deducted from the $5.0 million escrow amount and the net balance of the escrow will be paid to the seller. We estimate that the entire $5.0 million in escrow will be paid to the seller, and therefore, the estimated fair value of the consideration in escrow related to these liabilities is $5.0 million. We do not expect to receive any amount back from escrow, and therefore did not record a receivable from the escrow. Any changes to the fair value of the contingent consideration in the future of less than $5.0 million will result in recording a receivable from escrow. The receivable will be recorded at fair value. As of September 30, 2013, the fair value of the receivable is $0.0 million.
	Preliminary Allocation of Consideration Transferred to Net Assets Acquired
	The following amounts represent the preliminary estimates of fair value of identifiable assets acquired and liabilities assumed in the ITS Acquisition and are based on management’s estimates, judgments and assumptions. These estimates, judgments and assumptions are subject to change upon final valuation and should be treated as preliminary values. Management estimated that the fair value of the net assets acquired less noncontrolling interest equals consideration paid. Therefore, there was no goodwill recorded.

	The final allocation of consideration will include changes in (1) amounts deposited in escrow, (2) estimated fair values of property and equipment, (3) allocations to intangible assets and liabilities, (4) changes in contingent consideration, and (5) other assets and liabilities. These amounts will be finalized as soon as possible, but no later than one year from the acquisition date.


			April 22, 2013
			(In thousands)
	Cash and cash equivalents		$	7,009
	Accounts and notes receivable, net(1)			48,795
	Other current assets			1,803
	Accounts payable and accrued liabilities			(39,156	)
	Accrued income taxes			(1,251	)

	Working capital excluding rig materials and supplies			17,200
	Rig materials and supplies			11,514
	Property, plant and equipment, net(2)			70,339
	Investment in joint venture			4,134
	Other noncurrent assets			2,818

	Total tangible assets			106,005
	Deferred income tax assets — current			222
	Deferred income tax assets — noncurrent(3)			14,153
	Intangible assets(4)
	Trade name, developed technology, and customer relationship			10,000
	Indefinite-lived intangible assets			200

	Total assets acquired			130,580

	Other long-term liabilities			(211	)
	Long-term deferred tax liability			(2,661	)

	Net assets acquired			127,708
	Less: Noncontrolling interest(5)			(2,708	)

	Total consideration transferred		$	125,000


		-1	Gross contractual amounts receivable totaled $54.7 million as of the acquisition date.
		-2	We recorded an adjustment of $43.7 million to reduce the historical carrying value of the acquired property, plant and equipment to its estimated fair value.
		-3	In connection with the ITS Acquisition, we recorded a $7.7 million adjustment to increase deferred income tax assets primarily related to the differences between acquisition date estimated fair value and tax basis of acquired property, plant and equipment.
		-4	We recorded $10.0 million and $0.2 million to reflect the estimated fair values of definite and indefinite lived intangible assets, respectively, recognized in connection with the ITS Acquisition. Our depreciation and amortization expense will reflect this valuation adjustment as the definite lived intangible assets are amortized in future periods. Definite lived intangible assets recorded in connection with the ITS Acquisition, which primarily relate to trade names, customer relationships, and developed technology will be amortized over a weighted average period of approximately 3.4 years.
		-5	We recorded an adjustment of $1.0 million to write-down the noncontrolling interest to its estimated fair value. The estimated fair value of the noncontrolling interest was calculated as a percentage of the net assets acquired related to certain subsidiaries in which ITS holds less than a 100 percent controlling interest. The fair value of the net assets of these subsidiaries was primarily based on the income approach valuation model.
Schedule of Pro Forma Information for Business Acquisition	'
	The following unaudited supplemental pro forma results present consolidated information for the nine months ended September 30, 2013 as if the ITS Acquisition had been completed on January 1, 2012. The pro forma results have been calculated after applying our accounting policies and include, among others, (i) the amortization associated with the fair value of the acquired intangible assets, (ii) interest expense associated with the Goldman Term Loan and (iii) the impact of certain fair value adjustments such as a decrease in depreciation expense related to the write-down in property, plant and equipment. The pro forma results do not include any potential synergies, non-recurring charges which result directly from the ITS Acquisition, cost savings or other expected benefits of the ITS Acquisition. The pro forma financial information does not necessarily represent what would have occurred if the transaction had taken place at the beginning of the period presented and should not be taken as representative of our future consolidated results of operations. We have not concluded our integration work. Accordingly, this pro forma information does not include all costs related to the integration nor the benefits we expect to realize from operating synergies.


			Nine Months Ended September 30,
			2013			2012
			(Dollars in thousands, except per share data)
	Revenue		$	671,738		$	614,679
	Net income		$	33,081		$	54,927
	Net income attributable to Parker Drilling		$	32,629		$	55,073
	Earnings per share — basic		$	0.27		$	0.47
	Earnings per share — diluted		$	0.27		$	0.46

	Basic number of shares			119,443,260			117,458,365
	Diluted number of shares			121,693,781			118,810,195

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
Accumulated Other Comprehensive Income (Tables)	Sep. 30, 2013
Schedule of accumulated other comprehensive income	'
	Accumulated other comprehensive loss consisted of the following:


		Foreign Currency Items
		(in thousands)
	December 31, 2012	$	—
	Current period other comprehensive income		957

	September 30, 2013	$	957

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Jun. 30, 2011

Mar. 31, 2011

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Country

Customer

Rigs

Country

Rigs

Revenue, Major Customer [Line Items]

Number of countries with operations

Number of countries in which Entity has operated since inception

Barge drilling rigs

Land rings

Percentage accounted for under the equity method

50.00%

Reimbursement cost

$16,200,000

$12,100,000

$46,500,000

$29,800,000

$44,900,000

$64,200,000

$40,100,000

Foreign currency translation impact over net income and retained earnings

6,400,000

Collection period

'90 days

Capitalized interest costs of construction of rigs

700,000

2,500,000

1,700,000

7,900,000

10,200,000

19,300,000

13,500,000

Net assets held for sale including current asset

7,485,000

6,800,000

5,315,000

7,485,000

6,800,000

5,315,000

Consumed and replenished period

'1 year

Rate of recognized income tax position being realized

50.00%

Deposits in domestic bank

117,100,000

12,200,000

10,200,000

117,100,000

12,200,000

10,200,000

Deposits in foreign banks

51,800,000

34,500,000

38,400,000

51,800,000

34,500,000

38,400,000

Number of major customer

Construction revenue

335,500,000

325,900,000

Contract margin

48,139,000

16,405,000

34,038,000

46,440,000

54,018,000

44,399,000

49,966,000

40,797,000

21,204,000

118,908,000

134,496,000

150,901,000

156,366,000

73,167,000

Share-based awards vesting period

'3 years

Liberty Rig Construction Contract [Member]

Revenue, Major Customer [Line Items]

Contract margin

11,700,000

Scenario, Previously Reported [Member]

Revenue, Major Customer [Line Items]

Net assets held for sale including current asset

$11,550,000

Exxon Neftegas Limited [Member]

Revenue, Major Customer [Line Items]

Percentage of revenue from major customer

14.30%

11.80%

Customer Two [Member]

Revenue, Major Customer [Line Items]

Percentage of revenue from major customer

10.40%

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Summary of Total Accounts and Notes Receivable (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012		Dec. 31, 2011
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012		Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'		'
Trade	'	$176,029		$184,817
Notes receivable	'	650		650
Allowance for doubtful accounts	'	-8,117	[1]	-1,544	[1]
Total accounts and notes receivable, net of allowance for bad debt	$249,623	$168,562		$183,923

[1]	Additional information on the allowance for doubtful accounts for the years ended December 31, 2012, 2011 and 2010 is reported on Schedule II - Valuation and Qualifying Accounts.

Summary_of_Significant_Account5

Summary of Significant Accounting Policies - Summary of Depreciable Lives for Different Categories of Property Plant and Equipment (Detail)	12 Months Ended
	Dec. 31, 2012
Minimum [Member] \| Land drilling equipment [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment, useful life	'3 years
Minimum [Member] \| Barge drilling equipment [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment, useful life	'3 years
Minimum [Member] \| Drill pipe, rental tools and other [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment, useful life	'4 years
Minimum [Member] \| Buildings and improvements [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment, useful life	'15 years
Maximum [Member] \| Land drilling equipment [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment, useful life	'20 years
Maximum [Member] \| Barge drilling equipment [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment, useful life	'20 years
Maximum [Member] \| Drill pipe, rental tools and other [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment, useful life	'7 years
Maximum [Member] \| Buildings and improvements [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment, useful life	'30 years

Asset_Impairment_Additional_In

Asset Impairment - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011
	Rigs	Rigs
Impaired Long-Lived Assets Held and Used [Line Items]	'	'
Number of rigs combined	2	2
Current estimated cost of rigs	$385,000,000	$385,000,000
Estimated total capitalized interest	50,700,000	50,700,000
Carrying value of rigs	339,500,000	339,500,000
Impairments and other charges	170,000,000	170,000,000
Asset Impairment charge after tax	109,100,000	'
Fair value of rigs	$169,500,000	$169,500,000
Discounted rate of interests	10.00%	'

Disposition_of_Assets_Addition

Disposition of Assets - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Component of Other Expense, Nonoperating [Line Items]	'	'	'
Asset dispositions, proceeds	$200,000	$0	$0
Asset dispositions, loss	500,000	'	'
Provision for reduction in carrying value of certain assets	$0	$1,350,000	$1,952,000

Assets_Held_for_Sale_Additiona

Assets Held for Sale - Additional Information (Detail) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

1 Months Ended

Sep. 30, 2013

Jun. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Nov. 07, 2013

Dec. 31, 2012

Sep. 30, 2012

Dec. 31, 2012

Rigs

Subsequent Event [Member]

Scenario, Previously Reported [Member]

Kazakhstan [Member]

Rig [Member]

Long Lived Assets Held-for-sale [Line Items]

Assets held for sale

$7,485,000

$6,800,000

$5,315,000

$11,550,000

$6,400,000

$5,300,000

Number of Land Rigs classification assets held for sale

Number of Land Rigs impacting assets held for sale in future

Received in down payment and deposits

1,600,000

Non-cash write-down of assets

900,000

Gain on disposition of assets, net

1,094,000

606,000

2,759,000

2,466,000

1,974,000

3,659,000

4,620,000

100,000

Additional depreciation recorded during period

$700,000

Income_Taxes_Summary_of_Compon

Income Taxes - Summary of Components of Income (Loss) Before Income Taxes (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule Of Income Before Income Tax Domestic And Foreign Line Items	'	'	'	'	'	'	'
United States	'	'	'	'	$52,422	($61,434)	$1,865
Foreign	'	'	'	'	18,555	-3,978	9,640
Income (loss) before income taxes	$17,230	$17,526	$35,905	$88,420	$70,977	($65,412)	$11,505

Income_Taxes_Summary_of_Income

Income Taxes - Summary of Income Tax Expense (Benefit) (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:	'	'	'	'	'	'	'
Federal	'	'	'	'	$7,791	$17,168	($273)
State	'	'	'	'	733	1,264	184
Foreign	'	'	'	'	9,518	15,176	27,610
Deferred:	'	'	'	'	'	'	'
Federal	'	'	'	'	15,612	-46,694	-3,981
State	'	'	'	'	4,296	1,864	1,459
Foreign	'	'	'	'	-4,071	-3,545	1,214
Total income tax expense (benefit)	$9,112	$6,695	$18,841	$31,155	$33,879	($14,767)	$26,213

Income_Taxes_Schedule_of_Incom

Income Taxes - Schedule of Income Tax Reconciliation from Federal Income Tax Statutory Rate (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Reconciliation [Line Items]	'	'	'
Computed Expected Tax Expense, Percentage	35.00%	35.00%	35.00%
Foreign Taxes, Percentage	19.00%	-24.00%	165.00%
Tax Effect Different From Statutory Rates, Percentage	-11.00%	2.00%	-70.00%
State Taxes, net of federal benefit, Percentage	7.00%	-4.00%	14.00%
Foreign Tax Credits, Percentage	-3.00%	22.00%	-134.00%
Change in Valuation Allowance, Percentage	-2.00%	-4.00%	4.00%
Uncertain Tax Positions, percentage	-10.00%	-2.00%	9.00%
Permanent Differences, Percentage	8.00%	-10.00%	52.00%
Prior Year Return to Provision Adjustments, Percentage	4.00%	-1.00%	15.00%
Other, Percentage	1.00%	-1.00%	13.00%
Unremitted Foreign Earnings-Current Year Adjustment, Percentage	0.00%	8.00%	0.00%
Actual Tax Expense, Percentage	48.00%	22.00%	228.00%
Computed Expected Tax Expense, Amount	$24,842	($22,894)	$4,027
Foreign Taxes, Amount	13,428	15,644	18,951
Tax Effect Different From Statutory Rates, Amount	-8,080	-1,571	-7,996
State Taxes, net of federal benefit, Amount	4,757	2,689	1,579
Foreign Tax Credits, Amount	-1,867	-14,595	-15,442
Tax settlement, Amount	'	'	1,200
Change in Valuation Allowance, Amount	-1,662	2,542	506
Uncertain Tax Positions, Amount	-6,814	1,348	983
Permanent Differences, Amount	5,477	6,356	6,003
Prior Year Return to Provision Adjustments, Amount	2,948	835	1,775
Other, Amount	850	899	1,501
Unremitted Foreign Earnings-Current Year Adjustment, Amount	'	-5,484	'
Actual Tax Expense, Amount	33,879	-14,767	26,213
Kazakhstan [Member]	'	'	'
Income Tax Reconciliation [Line Items]	'	'	'
Tax settlement, percentage	0.00%	1.00%	116.00%
Tax settlement, Amount	'	-536	13,304
Mexico [Member]	'	'	'
Income Tax Reconciliation [Line Items]	'	'	'
Tax settlement, percentage	0.00%	0.00%	9.00%
Tax settlement, Amount	'	'	$1,022

Income_Taxes_Components_of_Def

Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Current deferred tax assets:	'	'	'
Reserves established against realization of certain assets	'	$1,634	$3,284
Accruals	'	6,747	3,065
Other	'	361	301
Gross current deferred tax assets	'	8,742	6,650
Valuation allowance	'	'	'
Current deferred tax assets	13,473	8,742	6,650
Non-current deferred tax assets:	'	'	'
Federal net operating loss carryforwards	'	'	361
State net operating loss carryforwards	'	3,095	6,393
Other state deferred tax asset, net	'	914	656
Foreign Tax Credits	'	25,977	28,146
Note Hedge Interest	'	'	1,318
Uncertain tax positions	'	8,015	8,188
Foreign tax	'	5,838	9,824
Impairment of long-lived assets	'	56,190	59,500
Other	'	71	392
Gross long-term deferred tax assets	'	100,100	114,778
Valuation Allowance	'	-4,805	-6,467
Non-current deferred tax assets, net of valuation allowance	107,763	95,295	108,311
Net deferred tax assets	'	104,037	114,961
Non-current deferred tax liabilities:	'	'	'
Property, Plant and equipment	'	-19,139	-8,986
Accruals	'	-1,066	'
Foreign tax	'	'	-6,379
Convertible Debt	'	'	-31
Deferred compensation	'	2,001	1,243
Other state deferred tax liability, net	'	-2,643	'
Other	'	'	-630
Gross non-current deferred tax liabilities	-39,084	-20,847	-15,934
Net deferred tax asset	'	$83,190	$99,027

Income_Tax_BenefitExpense_Addi

Income Tax Benefit/Expense - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Line Items]	'	'	'	'	'	'	'
Income tax benefit	$9,112,000	$6,695,000	$18,841,000	$31,155,000	$33,879,000	($14,767,000)	$26,213,000
Depreciation and amortization	35,882,000	29,779,000	97,674,000	85,357,000	113,017,000	112,136,000	115,030,000
Decrease in valuation allowance	'	'	'	'	1,700,000	'	'
Non-cash pretax impairment charge relating to AADU rigs in Alaska	'	'	'	'	'	170,000,000	'
Increased valuation allowance	'	'	'	'	'	2,500,000	'
Increase in tax expense	'	'	'	'	'	'	14,500,000
Net of anticipated tax benefits	'	'	'	'	'	'	6,800,000
Approximated tax amount	'	'	'	'	'	'	6,500,000
Approximated interest amount	'	'	'	'	'	'	4,800,000
Approximated amount of penalties	'	'	'	'	'	'	3,200,000
Increase in tax expense from subsidiary settlement	'	'	'	'	'	'	1,200,000
Tax	'	'	'	'	'	'	600,000
Interest	'	'	'	'	'	'	100,000
Penalties	'	'	'	'	'	'	500,000
Liability for unrecognized tax benefits	10,500,000	12,000,000	10,500,000	12,000,000	-10,030,000	-15,492,000	'
Unrecognized tax benefits	3,800,000	5,200,000	3,800,000	5,200,000	3,200,000	'	'
Accrued interest and penalties related to uncertain tax positions	'	'	'	'	7,000,000	8,400,000	'
Increase of interest	'	'	'	'	200,000	'	'
Increase of penalties	'	'	'	'	1,100,000	'	'
Proceeds from income tax refunds	'	'	22,400,000	'	'	'	'
Interest from income tax refunds	'	'	2,200,000	'	'	'	'
Rig [Member]	'	'	'	'	'	'	'
Income Tax Disclosure [Line Items]	'	'	'	'	'	'	'
Depreciation and amortization	'	'	'	'	7,700,000	'	'
Us Federal Internal Revenue Service Examination [Member]	'	'	'	'	'	'	'
Income Tax Disclosure [Line Items]	'	'	'	'	'	'	'
Income tax benefit	'	'	'	'	1,700,000	'	'
Federal And State Jurisdiction [Member]	'	'	'	'	'	'	'
Income Tax Disclosure [Line Items]	'	'	'	'	'	'	'
Income tax benefit	'	'	'	'	'	$60,900,000	'

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2012
Reconciliation Of Unrecognized Tax Benefits [Line Items]	'	'	'
Beginning balance	($15,492)	$10,500	$12,000
Additions based on tax positions taken during a prior period	-1,495	'	'
Reductions based on tax positions taken during a prior period	4,102	'	'
Reductions related to a lapse of applicable statute of limitations	2,855	'	'
Ending balance	($10,030)	$10,500	$12,000

Income_Taxes_Open_Tax_Years_by

Income Taxes -Open Tax Years by Major Tax Jurisdiction (Detail)	12 Months Ended
	Dec. 31, 2012
Colombia [Member]	'
Open Tax Years By Major Jurisdiction [Line Items]	'
Open Tax Years by Major Tax Jurisdiction	'2008-present
Kazakhstan [Member]	'
Open Tax Years By Major Jurisdiction [Line Items]	'
Open Tax Years by Major Tax Jurisdiction	'2007-present
Mexico [Member]	'
Open Tax Years By Major Jurisdiction [Line Items]	'
Open Tax Years by Major Tax Jurisdiction	'2007-present
Papua New Guinea [Member]	'
Open Tax Years By Major Jurisdiction [Line Items]	'
Open Tax Years by Major Tax Jurisdiction	'2010-present
Russia [Member]	'
Open Tax Years By Major Jurisdiction [Line Items]	'
Open Tax Years by Major Tax Jurisdiction	'2009-present
United States - Federal [Member]	'
Open Tax Years By Major Jurisdiction [Line Items]	'
Open Tax Years by Major Tax Jurisdiction	'2011-present

LongTerm_Debt_Summary_of_Compa

Long-Term Debt - Summary of Company's Current Debt Portfolio (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument [Line Items]	'	'	'
Total debt	$653,968	$479,205	$482,723
Less current portion	0	10,000	145,723
Total long-term debt	653,968	469,205	337,000
9.125% Senior Notes, due April 2018 ( issued march 22, 2010) [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Total debt	'	300,000	300,000
9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Total debt	'	129,205	'
2.125% Convertible Senior Notes, due July 2012 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Total debt	'	'	121,723
Term Note [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Total debt	'	50,000	61,000
7.50% Senior Notes, due August 2020 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Total debt	225,000	0	'
9.125% Senior Notes, due April 2018 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Total debt	428,968	429,205	'
Term Note Due December Twenty Seventeen [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Total debt	$0	$50,000	'

LongTerm_Debt_Summary_of_Compa1

Long-Term Debt - Summary of Company's Current Debt Portfolio (Parenthetical) (Detail) (USD $)

12 Months Ended

3 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

Mar. 22, 2010

Dec. 31, 2012

Dec. 31, 2011

Apr. 25, 2012

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Jul. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Mar. 22, 2010

Dec. 31, 2012

9.125% Senior Notes, due April 2018 ( issued march 22, 2010) [Member]

9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]

2.125% Convertible Senior Notes, due July 2012 [Member]

Term Note [Member]

7.50% Senior Notes, due August 2020 [Member]

9.125% Senior Notes, due April 2018 [Member]

Term Note Due December Twenty Seventeen [Member]

Debt Instrument [Line Items]

Aggregate principal Convertible Senior Notes

$300,000,000

$125,000,000

$225,000,000

$300,000,000

Debt Instrument Maturity Date

'April 2018

'July 2012

'August 2020

'April 2018

'December 2017

Debt Instrument issuance date

'March 22, 2010

'April 25, 2012

Debt instrument fixed interest rate

9.13%

2.13%

7.50%

9.13%

Net unamortized discount

3,277,000

Amortization Term Loan

$6,000,000

$2,500,000

LIBOR Plus

3.21%

3.55%

LongTerm_Debt_Additional_Infor

Long-Term Debt - Additional Information (Detail) (USD $)

9 Months Ended

12 Months Ended

1 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

1 Months Ended

3 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

9 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

1 Months Ended

9 Months Ended

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2010

Sep. 30, 2013

Dec. 14, 2012

Dec. 31, 2011

31-May-08

Dec. 31, 2012

Sep. 30, 2012

Jul. 05, 2007

Dec. 14, 2012

Apr. 30, 2011

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2011

15-May-08

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Jul. 30, 2013

Jul. 19, 2013

Apr. 18, 2013

Sep. 30, 2013

Jul. 30, 2013

Dec. 31, 2012

Dec. 31, 2011

Mar. 22, 2010

Dec. 31, 2012

Apr. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Apr. 25, 2012

Dec. 31, 2011

31-May-12

Dec. 31, 2012

9-May-12

Sep. 30, 2012

Dec. 31, 2012

Jul. 15, 2012

Dec. 31, 2011

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 14, 2012

31-May-08

Sep. 30, 2013

Jul. 30, 2013

Dec. 31, 2012

Apr. 18, 2013

Sep. 30, 2013

Jul. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Mar. 22, 2010

2.125% Convertible Senior Notes, due July 2012 Repayment of Debt [Member]

Secured Debt [Member]

Revolving Credit Facility [Member]

Existing Credit Agreement [Member]

Unsecured Debt [Member]

Subsequent Event [Member]

ITS [Member]

Unsecured Debt [Member]

Maximum [Member]

Minimum [Member]

9.125% Senior Notes, due April 2018 ( issued march 22, 2010) [Member]

9.625% Senior Notes due 2013 [Member]

Senior secured revolving credit facility (Revolver) [Member]

9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]

2.125% Convertible Senior Notes due July 2012 [Member]

2.125% Convertible Senior Notes, due July 2012 [Member]

Term Note [Member]

7.50% Senior Notes, due August 2020 [Member]

Goldman Term Loan [Member]

Term Note Due April 2018 [Member]

9.125% Senior Notes, due April 2018 [Member]

Unsecured Debt [Member]

Revolving Credit Facility [Member]

2.125% Convertible Senior Notes, due July 2012 Repayment of Debt [Member]

Secured Debt [Member]

ITS [Member]

Debt Instrument [Line Items]

Debt premium

$4,200,000

$5,000,000

2013

11,000,000

2014

10,900,000

2015

10,800,000

2016

10,700,000

2017 and thereafter

435,800,000

Aggregate principal amount

125,000,000

300,000,000

125,000,000

225,000,000

125,000,000

300,000,000

Percentage of notes guaranteed by restricted subsidiaries

2.13%

9.13%

9.63%

9.13%

2.13%

7.50%

9.13%

Repayments of debt

225,000,000

42,000,000

Par value of senior notes

104.00%

Gross proceeds of aggregate principal amount additional issued

130,000,000

Repurchase of Convertible senior notes

122,900,000

Notes paid off

2,100,000

Debt issuance costs

5,400,000

11,600,000

3,600,000

Debt issuance cost, Net of amortization

8,100,000

7,600,000

Percentage of the aggregate principal amount redeemed

35.00%

Percentage of redemption price before notice

109.13%

Percentage of redemption price after notice

104.56%

Percentage of repurchase

101.00%

Redemption date

1-Apr-14

Tender offer price for each 1000 principal amount of 2.125% notes

1,003.27

Unit for which the tender offer price of 2.125% notes is calculated

1,000

One time debt extinguishment cost

1,800,000

Number of common shares under call options

9,027,713

Strike price of common stock shares

$18.29

Amortization period of debt issuance cost

'5 years

Senior secured credit facility

80,000,000

50,000,000

Increase in the amount of term loan or revolving credit facility

50,000,000

45,000,000

Aggregate commitment amount

180,000,000

250,000,000

Maturity of credit facility

14-Dec-17

14-May-13

Variation in applicable rate for LIBOR Rate Loan

2.50%

2.75%

Variation in applicable rate for LIBOR Rate Loan

3.00%

3.25%

Variation in applicable rate for Base Rate Loan

1.50%

1.75%

Variation in applicable rate for Base Rate Loan

2.00%

2.25%

Revolving loan outstanding

50,000,000

61,000,000

Letters of credit outstanding

3,800,000

4,500,000

2,700,000

Term Loan

50,000,000

Principal payments

2,500,000

6,000,000

Base rate plus

2.00%

2.25%

LIBOR Plus

3.00%

3.25%

3.21%

3.55%

Deferred acquisition costs

5,200,000

5,300,000

Redemption amount percentage of principal

35.00%

Redemption price

107.50%

Redemption price after year three

103.75%

Redemption price afer year five

101.00%

Amortization of premium

4,000,000

Proceeds from issuance of term note

225,000,000

Payments of debt extinguishment costs

519,000

555,000

7,466,000

5,200,000

Line of credit facility quarterly decrease in borrowing capacity

2,500,000

Line of credit facility, maximum borrowing capacity in year two

42,500,000

Line of credit facility, maximum borrowing capacity in year three

37,500,000

Long-term Debt

$479,205,000

$653,968,000

$482,723,000

$300,000,000

$129,205,000

$121,723,000

$50,000,000

$61,000,000

$50,000,000

$61,000,000

$225,000,000

$125,000,000

$428,968,000

$429,205,000

Derivative_Financial_Instrumen1

Derivative Financial Instruments - Additional Information (Detail) (USD $)	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	14-May-13	Jun. 27, 2011
	Agreement	Agreement	14-May-13	Jun. 27, 2011
Derivatives And Hedging Activities [Line Items]	'	'	'	'
Number of interest rate swap agreements	2	2	'	'
Notional amount of borrowings	'	$73	'	$73
Interest rate derivatives fixed interest rate	'	'	3.88%	3.88%
Nominal gain related to credit agreement	'	0.1	'	'
Interest rate swap termination date	'May 14, 2013	'	'	'
Maximum [Member]	'	'	'	'
Derivatives And Hedging Activities [Line Items]	'	'	'	'
Fair value of the interest rate swap liability	'	$0.10	'	'

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended			12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011
			Significant Other Observable Inputs (Level 2) [Member]	Significant Other Observable Inputs (Level 2) [Member]	U.S. Drilling [Member]
			Maximum [Member]	Maximum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'	'	'	'
Carrying amount of interest rate swap agreements	'	'	$100,000	$100,000	'
Carrying value of assets	339,500,000	339,500,000	'	'	339,500,000
Fair value	169,500,000	169,500,000	'	'	169,500,000
Impairments and other charges	$170,000,000	$170,000,000	'	'	$170,000,000

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments - Fair Values and Related Carrying Values of Debt Instruments (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Carrying Amount [Member]	'	'	'
Long-term Debt	'	'	'
Long term debt Fair value	$650,000	$425,000	$425,000
Carrying Amount [Member] \| 9.125% Senior Notes, due April 2018 ( issued march 22, 2010) [Member]	'	'	'
Long-term Debt	'	'	'
Long term debt Fair value	'	300,000	300,000
Carrying Amount [Member] \| 9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]	'	'	'
Long-term Debt	'	'	'
Long term debt Fair value	'	125,000	'
Carrying Amount [Member] \| 2.125% Convertible Senior Notes due July 2012 [Member]	'	'	'
Long-term Debt	'	'	'
Long term debt Fair value	'	0	125,000
Carrying Amount [Member] \| 7.50% Senior Notes, due August 2020 [Member]	'	'	'
Long-term Debt	'	'	'
Long term debt Fair value	225,000	0	'
Carrying Amount [Member] \| 9.125% Senior Notes, due April 2018 [Member]	'	'	'
Long-term Debt	'	'	'
Long term debt Fair value	425,000	425,000	'
Fair Value [Member]	'	'	'
Long-term Debt	'	'	'
Long term debt Fair value	679,750	453,688	438,204
Fair Value [Member] \| 9.125% Senior Notes, due April 2018 ( issued march 22, 2010) [Member]	'	'	'
Long-term Debt	'	'	'
Long term debt Fair value	'	320,250	315,000
Fair Value [Member] \| 9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]	'	'	'
Long-term Debt	'	'	'
Long term debt Fair value	'	133,438	'
Fair Value [Member] \| 2.125% Convertible Senior Notes due July 2012 [Member]	'	'	'
Long-term Debt	'	'	'
Long term debt Fair value	'	0	123,204
Fair Value [Member] \| 7.50% Senior Notes, due August 2020 [Member]	'	'	'
Long-term Debt	'	'	'
Long term debt Fair value	225,000	0	'
Fair Value [Member] \| 9.125% Senior Notes, due April 2018 [Member]	'	'	'
Long-term Debt	'	'	'
Long term debt Fair value	$454,750	$453,688	'

Common_Stock_and_Stockholders_2

Common Stock and Stockholders' Equity - Additional Information (Detail) (USD $)	12 Months Ended				0 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012	Sep. 17, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	2010 Long-Term Incentive Plan [Member]	Chief Executive Officer [Member]	Performance Units [Member]	Performance Units [Member]	Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'	'
Common stock granted under the 2010 plan	'	'	'	5,800,000	'	'	'	'
Restricted stock units, granted	'	'	'	'	349,651	'	'	'
Restricted shares to selected key personnel	1,558,347	1,457,039	'	'	'	'	'	'
Compensation expense related to the performance units	$7.20	$5.90	$5.50	'	'	$0.50	$2.10	$2.70
Total fair value of the shares vested	7.2	6.9	4.1	'	'	'	'	'
Weighted-average grant-date fair value of shares granted	$5.37	$5.61	$4.54	'	'	'	'	'
Non-vested restricted stock awards and restricted stock units	2,393,897	2,813,409	'	'	'	'	'	'
Total unrecognized compensation cost of unamortized non-vested stock awards	$6.80	'	'	'	'	'	'	'
Weighted-average vesting period	'20 months 3 days	'	'	'	'	'	'	'
Performance units under 2010 Long Term Incentive Plan	1,558,347	'	'	'	'	38,429	44,500	'
Performance units forfeited	505,626	'	'	'	'	3,955	2,424	'
Nominal value	'	'	'	'	'	$100	'	'
Performance at the maximum level	'3 years	'	'	'	'	'	'	'
Performance period-Awards percentage	200.00%	'	'	'	'	'	'	'
Common stock shares reserved for issuance	7,657,479	8,669,723	'	'	'	'	'	'
Stock option outstanding or exercisable	0	0	'	'	'	'	'	'
Treasury stock shares	1,411,371	1,709,963	'	'	'	'	'	'

Common_Stock_and_Stockholders_3

Common Stock and Stockholders' Equity - Summary of Long-Term Incentive Plans (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Nonvested beginning balance, shares	2,813,409	'	'
Granted, shares	1,558,347	'	'
Vested, shares	-1,472,233	'	'
Forfeited, shares	-505,626	'	'
Nonvested ending balance, shares	2,393,897	2,813,409	'
Nonvested beginning balance	$6.91	'	'
Granted	$5.37	$5.61	$4.54
Vested	$4.86	'	'
Forfeited	$5.44	'	'
Nonvested ending balance	$5.22	$6.91	'

Reconciliation_of_Income_and_N

Reconciliation of Income and Number of Shares Used to Calculate Basic and Diluted Earnings per Share (EPS) - Summary of Reconciliation of Income and Number of Shares Used to Calculate Basic and Diluted Earnings per Share (EPS) (Detail) (USD $)	3 Months Ended									9 Months Ended		12 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Earnings Per Share [Line Items]	'	'	'	'	'	'	'	'	'	'	'	'	'	'
EPS, income	$7,970	($20,098)	$10,936	$20,083	$26,392	($90,176)	$20,725	$14,173	$4,827	$16,843	$57,411	$37,313	($50,451)	($14,461)
Basic EPS, shares	119,990,196	'	118,109,214	'	'	'	'	'	'	119,443,260	117,458,365	117,721,135	116,081,590	114,258,965
Basic EPS	$0.07	($0.17)	$0.09	$0.17	$0.23	($0.77)	$0.18	$0.12	$0.04	$0.14	$0.49	$0.32	($0.43)	($0.13)
Stock options and restricted stock, shares	1,684,395	'	1,091,805	'	'	'	'	'	'	2,250,521	1,351,830	1,372,455	'	'
Stock options and restricted stock, per share amount	$0.14	($0.01)	$0.09	'	'	'	'	'	'	$0.14	$0.09	($0.01)	'	'
Diluted EPS, shares	121,674,591	'	119,201,019	'	'	'	'	'	'	121,693,781	118,810,195	119,093,590	116,081,590	114,258,965
Diluted EPS	$0.07	($0.17)	$0.09	$0.17	$0.22	($0.77)	$0.18	$0.12	$0.04	$0.14	$0.48	$0.31	($0.43)	($0.13)

Employee_Benefit_Plan_Addition

Employee Benefit Plan - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]	'	'	'
Plan contributions cost	$2.80	$2.40	$2.40
Employee vested percentage	100.00%	'	'
Participation waiting period	'30 days	'	'
First 4 percent of employees pre-tax contributions [Member]	'	'	'
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]	'	'	'
Employee vested percentage	100.00%	'	'
Next 2 percent of employees pre-tax contributions [Member]	'	'	'
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]	'	'	'
Employee vested percentage	50.00%	'	'

Reportable_Segments_Results_of

Reportable Segments - Results of Operations by Reportable Segment (Detail) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Jun. 30, 2011

Mar. 31, 2011

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Revenues:

Revenues

$237,762

$157,187

$165,301

$178,925

$176,569

$181,066

$176,589

$172,812

$156,179

$630,918

$520,795

$677,982

$686,646

$659,475

Operating gross margin:

Total operating gross margin

48,139

16,405

34,038

46,440

54,018

44,399

49,966

40,797

21,204

118,908

134,496

150,901

156,366

73,167

General and administrative expense

-14,188

[1]

-8,905

[1]

-49,449

[1]

-21,822

[1]

-46,052

-31,314

-30,728

Impairments and other charges

-170,000

Provision for reduction in carrying value of certain assets

-1,350

-1,952

Gain on disposition of assets, net

1,094

606

2,759

2,466

1,974

3,659

4,620

Total operating income

35,045

-8,317

25,739

40,388

49,013

-133,215

41,959

33,215

15,402

72,218

115,140

106,823

-42,639

45,107

Interest expense

-13,127

-8,171

-33,874

-25,133

-33,542

-22,594

-26,805

Changes in fair value of derivative positions

-5,218

-110

Loss on extinguishment of debt

-5,218

-117

-5,218

-1,766

-2,130

-7,209

Other

400

333

-382

-325

155

Income (loss) before income taxes

17,230

17,526

35,905

88,420

70,977

-65,412

11,505

Interest income

130

2,392

109

153

256

257

Identifiable assets:

Total identifiable assets

1,083,349

988,572

Corporate and other assets(4)

172,384

227,674

172,384

227,674

Assets

1,535,380

1,255,733

1,216,246

1,535,380

1,255,733

1,216,246

Other Segments [Member]

Identifiable assets:

Assets

1,293,678

1,083,349

1,293,678

1,083,349

Corporate Assets [Member]

Identifiable assets:

Assets

241,702

[2]

172,384

[2]

241,702

[2]

172,384

[2]

Rental Tools [Member]

Revenues:

Revenues

89,614

59,947

228,718

191,233

246,900

237,068

172,598

Operating gross margin:

Total operating gross margin

25,816

[3]

27,032

[3]

72,470

[3]

91,885

[3]

113,899

120,822

74,541

Identifiable assets:

Total identifiable assets

194,600

188,520

Rental Tools [Member] | Other Segments [Member]

Identifiable assets:

Assets

375,900

194,600

375,900

194,600

U.S. Barge Drilling [Member]

Revenues:

Revenues

33,919

33,142

102,085

94,269

123,672

93,763

64,543

Operating gross margin:

Total operating gross margin

12,236

[3]

11,042

[3]

37,657

[3]

29,215

[3]

39,774

11,116

-11,503

Identifiable assets:

Total identifiable assets

99,409

108,396

U.S. Barge Drilling [Member] | Other Segments [Member]

Identifiable assets:

Assets

84,402

99,409

84,402

99,409

U.S. Drilling [Member]

Revenues:

Revenues

18,693

48,238

1,387

Operating gross margin:

Total operating gross margin

103

[3]

-4,712

[3]

-4,618

[3]

-7,881

[3]

-15,168

-3,915

-217

Impairments and other charges

-170,000

Identifiable assets:

Total identifiable assets

374,794

265,166

U.S. Drilling [Member] | Other Segments [Member]

Identifiable assets:

Assets

367,020

374,794

367,020

374,794

International Drilling [Member]

Revenues:

Revenues

88,562

[4]

68,503

[4]

236,394

[4]

224,176

[4]

291,772

318,482

294,821

Operating gross margin:

Total operating gross margin

9,831

[3]

783

[3]

12,815

[3]

21,395

[3]

12,642

22,237

5,092

Identifiable assets:

Total identifiable assets

414,546

426,490

International Drilling [Member] | Other Segments [Member]

Identifiable assets:

Assets

466,356

414,546

466,356

414,546

Technical Services [Member]

Revenues:

Revenues

6,974

3,709

15,483

11,117

14,251

27,695

36,423

Operating gross margin:

Total operating gross margin

153

[3]

-107

[3]

584

[3]

-118

[3]

-246

5,335

5,052

Construction Contract [Member]

Revenues:

Revenues

9,638

91,090

Operating gross margin:

Total operating gross margin

$771

$202

[1]

General and administration expenses for field operations are included in operating expenses.

[2]

This category includes corporate assets as well as minimal assets for our Technical Services segment primarily related to office furniture and fixtures.

[3]

Operating gross margin is calculated as revenues less direct operating expenses, including depreciation and amortization expense.

[4]

For the nine months ended September 30, 2013, our largest customer, Exxon Neftegas Limited, constituted 14.3% of our total consolidated revenues and approximately 36.9% of our International Drilling segment. For the nine months ended September 30, 2012, our two largest customers, Exxon Neftegas Limited (ENL) and Schlumberger, constituted approximately 10.6% and 10.2%, respectively, of our total consolidated revenues and approximately 32.0% and 24.0%, respectively, of our International Drilling segments.

Reportable_Segments_Results_of1

Reportable Segments - Results of Operations by Reportable Segment (Parenthetical) (Detail)

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2010

Sep. 30, 2012

Sep. 30, 2013

Customer

International Drilling [Member]

Exxon Neftegas Limited [Member]

Customer Two [Member]

BP [Member]

ExxonMobil [Member]

Schlumberger [Member]

International Drilling [Member]

Construction Contract [Member]

Rental Tools [Member]

International Drilling [Member]

Segment Information [Line Items]

Number of major customer

Percent of total revenues

36.90%

14.30%

10.60%

12.00%

16.00%

32.00%

10.00%

12.00%

10.20%

24.00%

Percent of segment revenues

27.00%

34.00%

24.00%

90.00%

7.00%

22.00%

Reportable_Segments_Operations

Reportable Segments - Operations by Industry Segment (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Capital expenditures:	'	'	'	'	'	'	'
Total capital expenditures	'	'	$102,856	$147,658	$191,543	$190,399	$219,184
Depreciation and amortization:	'	'	'	'	'	'	'
Total depreciation and amortization	35,882	29,779	97,674	85,357	113,017	112,136	115,030
Rental Tools [Member]	'	'	'	'	'	'	'
Capital expenditures:	'	'	'	'	'	'	'
Total capital expenditures	'	'	'	'	61,958	61,702	48,872
Depreciation and amortization:	'	'	'	'	'	'	'
Total depreciation and amortization	'	'	'	'	42,944	40,497	36,558
U.S. Barge Drilling [Member]	'	'	'	'	'	'	'
Capital expenditures:	'	'	'	'	'	'	'
Total capital expenditures	'	'	'	'	8,808	7,339	5,315
Depreciation and amortization:	'	'	'	'	'	'	'
Total depreciation and amortization	'	'	'	'	13,906	17,006	22,165
U.S. Drilling [Member]	'	'	'	'	'	'	'
Capital expenditures:	'	'	'	'	'	'	'
Total capital expenditures	'	'	'	'	86,786	99,915	113,177
Depreciation and amortization:	'	'	'	'	'	'	'
Total depreciation and amortization	'	'	'	'	7,011	2,223	'
International Drilling [Member]	'	'	'	'	'	'	'
Capital expenditures:	'	'	'	'	'	'	'
Total capital expenditures	'	'	'	'	15,240	15,011	50,482
Depreciation and amortization:	'	'	'	'	'	'	'
Total depreciation and amortization	'	'	'	'	45,967	48,965	52,429
Corporate [Member]	'	'	'	'	'	'	'
Capital expenditures:	'	'	'	'	'	'	'
Total capital expenditures	'	'	'	'	18,751	6,432	1,338
Corporate and other [Member]	'	'	'	'	'	'	'
Depreciation and amortization:	'	'	'	'	'	'	'
Total depreciation and amortization	'	'	'	'	$3,189	$3,445	$3,878

Reportable_Segments_Results_of2

Reportable Segments - Results of Operations by Geographic Area (Detail) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Jun. 30, 2011

Mar. 31, 2011

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Revenues:

Total revenues

$237,762

$157,187

$165,301

$178,925

$176,569

$181,066

$176,589

$172,812

$156,179

$630,918

$520,795

$677,982

$686,646

$659,475

Operating gross margin:

Total operating gross margin

48,139

16,405

34,038

46,440

54,018

44,399

49,966

40,797

21,204

118,908

134,496

150,901

156,366

73,167

General and administrative expense

-14,188

[1]

-8,905

[1]

-49,449

[1]

-21,822

[1]

-46,052

-31,314

-30,728

Impairments and other charges

-170,000

Provision for reduction in carrying value of certain assets

-1,350

-1,952

Gain on disposition of assets, net

1,094

606

2,759

2,466

1,974

3,659

4,620

Total operating income (loss)

35,045

-8,317

25,739

40,388

49,013

-133,215

41,959

33,215

15,402

72,218

115,140

106,823

-42,639

45,107

Interest expense

-13,127

-8,171

-33,874

-25,133

-33,542

-22,594

-26,805

Changes in fair value of derivative positions

-5,218

-110

Loss on extinguishment of debt

-5,218

-117

-5,218

-1,766

-2,130

-7,209

Other

400

333

-382

-325

155

Income (loss) before income taxes

17,230

17,526

35,905

88,420

70,977

-65,412

11,505

Long-lived assets:

Total long-lived assets

858,672

789,123

719,809

858,672

789,123

719,809

Scenario, Previously Reported [Member]

Long-lived assets:

Total long-lived assets

786,158

Africa and Middle East [Member]

Revenues:

Total revenues

26,528

6,774

22,621

Operating gross margin:

Total operating gross margin

-2,234

-6,383

659

Long-lived assets:

Total long-lived assets

25,032

28,427

25,032

28,427

Asia Pacific [Member]

Revenues:

Total revenues

39,400

38,477

26,416

Operating gross margin:

Total operating gross margin

-927

1,933

2,374

Long-lived assets:

Total long-lived assets

15,723

18,300

15,723

18,300

CIS [Member]

Revenues:

Total revenues

122,304

176,421

149,963

Operating gross margin:

Total operating gross margin

6,840

26,402

8,139

Long-lived assets:

Total long-lived assets

106,774

119,282

106,774

119,282

Latin America [Member]

Revenues:

Total revenues

103,540

96,810

103,885

Operating gross margin:

Total operating gross margin

8,990

377

1,210

Long-lived assets:

Total long-lived assets

63,899

57,710

63,899

57,710

United States [Member]

Revenues:

Total revenues

386,210

368,164

356,590

Operating gross margin:

Total operating gross margin

138,232

134,037

60,785

Long-lived assets:

Total long-lived assets

$574,730

$496,090

$574,730

$496,090

[1]

General and administration expenses for field operations are included in operating expenses.

Commitments_and_Contingencies_1

Commitments and Contingencies - Schedule of Future Minimum Lease Payments Under Operating Leases with Non Cancelable Terms (Detail) (USD $)	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2012
Operating Leased Assets [Line Items]	'
2013	$6,734
2014	4,134
2015	3,851
2016	2,742
2017	2,092
Thereafter	8,209
Total	$27,762

Commitments_and_Contingencies_2

Commitments and Contingencies - Additional Information (Detail) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
	LegalMatter	LegalMatter	Dec. 31, 2011	Dec. 31, 2010
Commitment And Contingencies [Line Items]	'	'	'	'
Rent expense for operating leases	'	$11,800,000	$12,100,000	$12,000,000
Exposure per occurrence	250,000	250,000	'	'
Aggregate deductible for protection and indemnity and maritime employers' liability claims	'	500,000	'	'
Auto liability claims	'	100,000	'	'
Gross self insurance accruals	'	4,700,000	6,600,000	'
Related insurance recoveries	'	1,200,000	1,900,000	'
Number of pending claims	15	15	'	'
Percent of costs to study and remediate site	'	20.00%	'	'
Amount accrued	0	0	'	'
Deferred term for criminal violations of anti-bribery provisions of FCPA	'	'3 years	'	'
Fine paid by for retention and use of individual agent in Nigeria with respect to customs-related issues	11,760,000	11,760,000	'	'
Payment of disgorgement	'	3,050,000	'	'
Prejudgment interest	'	1,040,000	'	'
Prejudgment interest and disgorgement amount paid	'	4,090,000	'	'
Proposed settlement	'	15,850,000	'	'
Gulfco Site [Member]	'	'	'	'
Commitment And Contingencies [Line Items]	'	'	'	'
Percent of costs to study and remediate site	'	'	'	20.00%
Amount accrued	$900,000	'	$700,000	'
Minimum [Member]	'	'	'	'
Commitment And Contingencies [Line Items]	'	'	'	'
Employment agreements terms	'	'1 year	'	'
Maximum [Member]	'	'	'	'
Commitment And Contingencies [Line Items]	'	'	'	'
Employment agreements terms	'	'2 years	'	'

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Related Party Transaction [Line Items]	'	'	'
Consulting fees	'	$40,000	$123,750
Related party expenses	36,000	36,000	30,000
Revenue from affiliated	31,200,000	22,700,000	'
Ranch Lease Agreement [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Number of ranch lease agreements	2	'	'
Ranch Lease Agreement [Member] \| Cypress Springs Ranch [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Fees pursuant to the ranch lease agreements for right to utilize premises of ranches	39,875	'	'
Ranch Lease Agreement [Member] \| Camp Verde Ranch [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Fees pursuant to the ranch lease agreements for right to utilize premises of ranches	$1,650	'	'

Supplementary_Information_Addi

Supplementary Information - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Supplemental Financial Information [Line Items]	'	'
Deferred mobilization fees	$1.60	$2.20
Accrued interest expense	9.7	8.1
Worker's compensation liabilities	2.3	3
Accrued payroll and payroll taxes	26	26.8
Other Long Term Obligations [Member]	'	'
Supplemental Financial Information [Line Items]	'	'
Worker's compensation liabilities	$2.50	$3.60

Parent_Guarantor_NonGuarantor_2

Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements - Additional Information (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Jul. 30, 2013
	Sep. 30, 2013	Dec. 31, 2012	9.125% Senior Notes, due April 2018 [Member]	9.125% Senior Notes, due April 2018 [Member]	7.50% Senior Notes, due August 2020 [Member]	7.50% Senior Notes, due August 2020 [Member]
Supplemental Guarantor Financial Information [Line Items]	'	'	'	'	'	'
Percentage of guaranteed subsidiaries by the parent companies	100.00%	100.00%	'	'	'	'
Percentage of notes guaranteed by restricted subsidiaries	'	'	9.13%	9.13%	7.50%	7.50%

Parent_Guarantor_NonGuarantor_3

Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements - Consolidating Condensed Statement of Operations (Detail) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Jun. 30, 2011

Mar. 31, 2011

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Condensed Financial Statements [Line Items]

Total revenues

$237,762

$157,187

$165,301

$178,925

$176,569

$181,066

$176,589

$172,812

$156,179

$630,918

$520,795

$677,982

$686,646

$659,475

Operating expenses

153,741

101,484

414,336

300,942

414,064

418,144

471,278

Depreciation and amortization

35,882

29,779

97,674

85,357

113,017

112,136

115,030

Total operating gross margin

48,139

16,405

34,038

46,440

54,018

44,399

49,966

40,797

21,204

118,908

134,496

150,901

156,366

73,167

General and administration expense

-14,188

[1]

-8,905

[1]

-49,449

[1]

-21,822

[1]

-46,052

-31,314

-30,728

Impairment and other charges

-170,000

Provision for reduction in carrying value of certain assets

-1,350

-1,952

Gain on disposition of assets, net

1,094

606

2,759

2,466

1,974

3,659

4,620

Total operating income (loss)

35,045

-8,317

25,739

40,388

49,013

-133,215

41,959

33,215

15,402

72,218

115,140

106,823

-42,639

45,107

Other income and (expense):

Interest expense

-13,127

-8,171

-33,874

-25,133

-33,542

-22,594

-26,805

Changes in fair value of derivative positions

-5,218

-110

Interest income

130

2,392

109

153

256

257

Changes in fair value of derivative positions

-5,218

-117

-5,218

-1,766

-2,130

-7,209

Other

400

333

-382

-325

155

Equity in net earnings of subsidiaries

Total other expense

-17,815

-8,213

-36,313

-26,720

-35,846

-22,773

-33,602

Income (benefit) before income taxes

17,230

17,526

35,905

88,420

70,977

-65,412

11,505

Income tax expense (benefit):

Current

18,042

33,608

27,521

Deferred

12,872

8,403

15,837

-48,375

-1,308

Income tax expense (benefit)

9,112

6,695

18,841

31,155

33,879

-14,767

26,213

Net income (loss)

8,118

10,831

17,064

57,265

37,098

-50,645

-14,708

Less: Net (loss) attributable to noncontrolling interest

148

-105

221

-146

-215

-194

-247

Net income (loss) attributable to controlling interest

7,970

-20,098

10,936

20,083

26,392

-90,176

20,725

14,173

4,827

16,843

57,411

37,313

-50,451

-14,461

Parent [Member]

Condensed Financial Statements [Line Items]

Total revenues

Operating expenses

Depreciation and amortization

Total operating gross margin

General and administration expense

-47

[1]

-47

[1]

-140

[1]

-137

[1]

-218

-225

Gain on disposition of assets, net

Total operating income (loss)

-47

-140

-137

-218

-225

Other income and (expense):

Interest expense

-14,035

-9,105

-36,734

-27,923

-26,654

-30,771

Changes in fair value of derivative positions

-5,218

-110

Interest income

360

3,366

8,695

18,131

42,000

Changes in fair value of derivative positions

-117

-5,218

-1,766

-2,130

-7,209

Other

-1

Equity in net earnings of subsidiaries

22,322

10,596

36,330

61,553

43,884

-23,484

-22,962

Total other expense

3,428

1,488

-2,202

40,567

-32,117

-18,942

Income (benefit) before income taxes

3,381

1,441

-2,342

40,430

-32,335

-19,167

Income tax expense (benefit):

Current

-13,402

139

Deferred

-2,860

5,940

2,257

31,518

-4,845

Income tax expense (benefit)

-4,589

-9,495

-19,185

-16,981

18,116

-4,706

Net income (loss)

7,970

10,936

16,843

57,411

37,313

-50,451

-14,461

Less: Net (loss) attributable to noncontrolling interest

Net income (loss) attributable to controlling interest

7,970

10,936

16,843

57,411

-50,451

-14,461

Guarantor [Member]

Condensed Financial Statements [Line Items]

Total revenues

119,223

98,969

345,434

302,892

376,229

366,947

Operating expenses

64,297

45,850

186,708

136,849

175,465

237,584

Depreciation and amortization

19,956

17,866

57,335

49,127

65,354

62,744

63,402

Total operating gross margin

34,970

35,253

101,391

116,916

138,020

65,961

General and administration expense

-14,028

[1]

-8,823

[1]

-48,942

[1]

-21,273

[1]

-30,859

-30,193

Impairment and other charges

-170,000

Provision for reduction in carrying value of certain assets

-1,350

-1,952

Gain on disposition of assets, net

-34

553

1,917

1,168

775

2,706

2,067

Total operating income (loss)

20,908

26,983

54,366

96,811

-61,483

35,883

Other income and (expense):

Interest expense

-107

-43

-167

-115

-17,889

-35,640

Changes in fair value of derivative positions

Interest income

250

179

1,584

4,894

750

757

Changes in fair value of derivative positions

Other

-11

-178

-345

Equity in net earnings of subsidiaries

Total other expense

132

162

1,239

4,843

-17,484

-34,795

Income (benefit) before income taxes

21,040

27,145

55,605

101,654

-78,967

1,088

Income tax expense (benefit):

Current

27,169

-189

Deferred

10,479

4,868

15,429

-57,030

2,323

Income tax expense (benefit)

10,223

10,451

27,993

38,149

-29,861

2,134

Net income (loss)

10,817

16,694

27,612

63,505

54,961

-49,106

-1,046

Less: Net (loss) attributable to noncontrolling interest

Net income (loss) attributable to controlling interest

10,817

16,694

27,612

63,505

-49,106

-1,046

Non-Guarantor [Member]

Condensed Financial Statements [Line Items]

Total revenues

170,609

94,749

388,912

295,811

426,491

401,617

Operating expenses

141,514

84,051

331,056

242,001

358,753

342,783

Depreciation and amortization

15,926

11,913

40,339

36,230

47,663

49,392

51,628

Total operating gross margin

13,169

-1,215

17,517

17,580

18,346

7,206

General and administration expense

-113

[1]

-35

[1]

-367

[1]

-412

[1]

-237

-310

Gain on disposition of assets, net

1,128

842

1,298

1,199

953

2,553

Total operating income (loss)

14,184

-1,197

17,992

18,466

19,062

9,449

Other income and (expense):

Interest expense

-2,198

-1,840

-9,494

-5,811

-8,865

-16,185

Changes in fair value of derivative positions

Interest income

2,733

2,573

9,963

39,345

12,189

23,291

Changes in fair value of derivative positions

Other

412

511

-2

Equity in net earnings of subsidiaries

Total other expense

947

733

980

33,532

3,344

7,173

Income (benefit) before income taxes

15,131

-464

18,972

51,998

22,406

16,622

Income tax expense (benefit):

Current

19,841

27,571

Deferred

5,253

-2,405

-1,849

-22,863

1,214

Income tax expense (benefit)

3,478

5,739

10,033

9,987

-3,022

28,785

Net income (loss)

11,653

-6,203

8,939

42,011

32,816

25,428

-12,163

Less: Net (loss) attributable to noncontrolling interest

148

-105

221

-146

-194

-247

Net income (loss) attributable to controlling interest

11,505

-6,098

8,718

42,157

25,622

-11,916

Eliminations [Member]

Condensed Financial Statements [Line Items]

Total revenues

-52,070

-28,417

-103,428

-77,908

-116,074

-109,089

Operating expenses

-52,070

-28,417

-103,428

-77,908

-116,074

-109,089

Depreciation and amortization

Total operating gross margin

General and administration expense

[1]

Gain on disposition of assets, net

Total operating income (loss)

Other income and (expense):

Interest expense

3,213

2,817

12,521

8,716

30,814

55,791

Changes in fair value of derivative positions

Interest income

-3,213

-2,817

-12,521

-52,825

-30,814

-65,791

Changes in fair value of derivative positions

Other

Equity in net earnings of subsidiaries

-22,322

-10,596

-36,330

-61,553

-43,884

23,484

22,962

Total other expense

-22,322

-10,596

-36,330

-105,662

23,484

12,962

Income (benefit) before income taxes

-22,322

-10,596

-36,330

-105,662

23,484

12,962

Income tax expense (benefit):

Deferred

Income tax expense (benefit)

Net income (loss)

-22,322

-10,596

-36,330

-105,662

-87,992

23,484

12,962

Less: Net (loss) attributable to noncontrolling interest

Net income (loss) attributable to controlling interest

($22,322)

($10,596)

($36,330)

($105,662)

$23,484

$12,962

[1]

General and administration expenses for field operations are included in operating expenses.

Parent_Guarantor_NonGuarantor_4

Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements - Consolidating Condensed Balance Sheet (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current assets:	'	'	'	'	'	'
Cash and cash equivalents	$162,457	$87,886	$114,127	$97,869	$51,431	$108,803
Accounts and notes receivable, net	249,623	168,562	'	183,923	'	'
Rig materials and supplies	40,202	28,860	'	29,947	'	'
Deferred costs	13,583	1,089	'	3,249	'	'
Deferred income taxes	13,473	8,742	'	6,650	'	'
Other tax assets	18,433	33,524	'	25,358	'	'
Assets held for sale	7,485	6,800	'	5,315	'	'
Other current assets	20,906	12,821	'	15,302	'	'
Total current assets	526,162	348,284	'	367,613	'	'
Property, plant and equipment, net	858,672	789,123	'	719,809	'	'
Other noncurrent assets	150,546	118,326	'	128,824	'	'
Total assets	1,535,380	1,255,733	'	1,216,246	'	'
Current liabilities:	'	'	'	'	'	'
Current portion of long-term debt	0	10,000	'	145,723	'	'
Accounts payable and accrued liabilities	191,229	137,746	'	135,250	'	'
Accrued income taxes	7,261	4,120	'	4,837	'	'
Total current liabilities	198,490	151,866	'	285,810	'	'
Long-term debt	653,968	469,205	'	337,000	'	'
Other long-term liabilities	24,048	23,182	'	33,452	'	'
Long-term deferred tax liability	39,084	20,847	'	15,934	'	'
Contingencies	'	'	'	'	'	'
Stockholders' equity:	'	'	'	'	'	'
Common stock	20,050	19,818	'	19,508	'	'
Capital in excess of par value	654,750	646,217	'	637,042	'	'
Accumulated other comprehensive income	957	0	'	'	'	'
Retained earnings (accumulated deficit)	-57,788	-74,631	'	-111,944	'	'
Total controlling interest stockholders' equity	617,969	591,404	'	544,606	'	'
Noncontrolling interest	1,821	-771	'	-556	'	'
Total Equity	619,790	590,633	'	544,050	588,066	595,899
Total liabilities and stockholders' equity	1,535,380	1,255,733	'	1,216,246	'	'
Scenario, Previously Reported [Member]	'	'	'	'	'	'
Current assets:	'	'	'	'	'	'
Assets held for sale	'	11,550	'	'	'	'
Total current assets	'	353,034	'	'	'	'
Property, plant and equipment, net	'	786,158	'	'	'	'
Current liabilities:	'	'	'	'	'	'
Long-term deferred tax liability	'	20,847	'	'	'	'
Parent [Member]	'	'	'	'	'	'
Current assets:	'	'	'	'	'	'
Cash and cash equivalents	89,516	42,251	77,468	55,670	13,835	58,189
Accounts and notes receivable, net	290,856	289,957	'	289,512	'	'
Other tax assets	43,171	46,249	'	47,834	'	'
Other current assets	'	'	'	788	'	'
Total current assets	423,543	378,457	'	393,804	'	'
Property, plant and equipment, net	60	60	'	79	'	'
Investment in subsidiaries and intercompany advances	944,584	780,878	'	720,214	'	'
Other noncurrent assets	52,147	43,569	'	44,962	'	'
Total assets	1,420,334	1,202,964	'	1,159,059	'	'
Current liabilities:	'	'	'	'	'	'
Current portion of long-term debt	'	10,000	'	145,723	'	'
Accounts payable and accrued liabilities	81,524	65,839	'	60,120	'	'
Accrued income taxes	'	'	'	-205	'	'
Total current liabilities	81,524	75,839	'	205,638	'	'
Long-term debt	653,968	469,205	'	337,000	'	'
Other long-term liabilities	4,289	3,933	'	8,081	'	'
Long-term deferred tax liability	'	'	'	1,151	'	'
Intercompany payables	62,584	62,583	'	62,583	'	'
Contingencies	'	'	'	'	'	'
Stockholders' equity:	'	'	'	'	'	'
Common stock	20,050	19,818	'	19,508	'	'
Capital in excess of par value	654,750	646,217	'	637,042	'	'
Retained earnings (accumulated deficit)	-56,831	-74,631	'	-111,944	'	'
Total controlling interest stockholders' equity	617,969	591,404	'	544,606	'	'
Total Equity	617,969	591,404	'	544,606	'	'
Total liabilities and stockholders' equity	1,420,334	1,202,964	'	1,159,059	'	'
Guarantor [Member]	'	'	'	'	'	'
Current assets:	'	'	'	'	'	'
Cash and cash equivalents	21,273	11,023	7,906	4,212	2,317	1,768
Accounts and notes receivable, net	113,873	98,747	'	94,748	'	'
Rig materials and supplies	2,364	2,834	'	762	'	'
Deferred costs	32	'	'	'	'	'
Deferred income taxes	12,363	7,615	'	5,311	'	'
Other tax assets	-46,939	-31,136	'	-25,218	'	'
Assets held for sale	1,183	'	'	'	'	'
Other current assets	14,238	8,675	'	6,381	'	'
Total current assets	118,387	97,758	'	86,196	'	'
Property, plant and equipment, net	559,885	548,794	'	474,942	'	'
Investment in subsidiaries and intercompany advances	-220,110	-233,388	'	-212,883	'	'
Other noncurrent assets	60,002	59,541	'	66,660	'	'
Total assets	518,164	472,705	'	414,915	'	'
Current liabilities:	'	'	'	'	'	'
Accounts payable and accrued liabilities	101,207	93,243	'	94,056	'	'
Accrued income taxes	529	612	'	921	'	'
Total current liabilities	101,736	93,855	'	94,977	'	'
Other long-term liabilities	5,806	6,129	'	9,474	'	'
Long-term deferred tax liability	47,684	36,894	'	25,232	'	'
Intercompany payables	43,669	43,657	'	43,657	'	'
Contingencies	'	'	'	'	'	'
Stockholders' equity:	'	'	'	'	'	'
Common stock	18,049	18,049	'	18,049	'	'
Capital in excess of par value	733,899	733,112	'	733,120	'	'
Retained earnings (accumulated deficit)	-432,679	-458,991	'	-509,594	'	'
Total controlling interest stockholders' equity	319,269	292,170	'	241,575	'	'
Total Equity	319,269	292,170	'	241,575	'	'
Total liabilities and stockholders' equity	518,164	472,705	'	414,915	'	'
Non-Guarantor [Member]	'	'	'	'	'	'
Current assets:	'	'	'	'	'	'
Cash and cash equivalents	51,668	34,612	28,753	37,987	35,279	48,846
Accounts and notes receivable, net	386,521	292,644	'	285,326	'	'
Rig materials and supplies	37,838	26,026	'	29,185	'	'
Deferred costs	13,551	1,089	'	3,249	'	'
Deferred income taxes	1,110	1,127	'	853	'	'
Other tax assets	22,201	18,411	'	2,742	'	'
Assets held for sale	6,302	6,800	'	5,315	'	'
Other current assets	6,668	4,146	'	8,133	'	'
Total current assets	525,859	384,855	'	372,790	'	'
Property, plant and equipment, net	298,727	240,269	'	244,787	'	'
Investment in subsidiaries and intercompany advances	1,593,743	1,467,429	'	1,347,719	'	'
Other noncurrent assets	38,397	15,216	'	16,839	'	'
Total assets	2,456,726	2,107,769	'	1,982,135	'	'
Current liabilities:	'	'	'	'	'	'
Accounts payable and accrued liabilities	263,709	205,864	'	181,010	'	'
Accrued income taxes	6,732	3,508	'	4,121	'	'
Total current liabilities	270,441	209,372	'	185,131	'	'
Other long-term liabilities	13,953	13,120	'	15,897	'	'
Long-term deferred tax liability	-8,600	-16,047	'	-11,296	'	'
Intercompany payables	359,106	216,320	'	111,619	'	'
Contingencies	'	'	'	'	'	'
Stockholders' equity:	'	'	'	'	'	'
Common stock	43,003	43,003	'	43,003	'	'
Capital in excess of par value	1,579,458	1,455,246	'	1,444,091	'	'
Accumulated other comprehensive income	957	'	'	'	'	'
Retained earnings (accumulated deficit)	196,587	187,526	'	194,246	'	'
Total controlling interest stockholders' equity	1,820,005	1,685,775	'	1,681,340	'	'
Noncontrolling interest	1,821	-771	'	-556	'	'
Total Equity	1,821,826	1,685,004	'	1,680,784	'	'
Total liabilities and stockholders' equity	2,456,726	2,107,769	'	1,982,135	'	'
Non-Guarantor [Member] \| Scenario, Previously Reported [Member]	'	'	'	'	'	'
Current assets:	'	'	'	'	'	'
Assets held for sale	'	11,550	'	'	'	'
Total current assets	'	389,605	'	'	'	'
Eliminations [Member]	'	'	'	'	'	'
Current assets:	'	'	'	'	'	'
Cash and cash equivalents	0	0	0	0	'	'
Accounts and notes receivable, net	-541,627	-512,786	'	-485,663	'	'
Deferred income taxes	'	'	'	486	'	'
Total current assets	-541,627	-512,786	'	-485,177	'	'
Property, plant and equipment, net	'	'	'	1	'	'
Investment in subsidiaries and intercompany advances	-2,318,217	-2,014,919	'	-1,855,050	'	'
Other noncurrent assets	'	'	'	363	'	'
Total assets	-2,859,844	-2,527,705	'	-2,339,863	'	'
Current liabilities:	'	'	'	'	'	'
Accounts payable and accrued liabilities	-255,211	-227,200	'	-199,936	'	'
Total current liabilities	-255,211	-227,200	'	-199,936	'	'
Long-term deferred tax liability	'	'	'	847	'	'
Intercompany payables	-465,359	-322,560	'	-217,859	'	'
Contingencies	'	'	'	'	'	'
Stockholders' equity:	'	'	'	'	'	'
Common stock	-61,052	-61,052	'	-61,052	'	'
Capital in excess of par value	-2,313,357	-2,188,358	'	-2,177,211	'	'
Retained earnings (accumulated deficit)	235,135	271,465	'	315,348	'	'
Total controlling interest stockholders' equity	-2,139,274	-1,977,945	'	-1,922,915	'	'
Total Equity	-2,139,274	-1,977,945	'	-1,922,915	'	'
Total liabilities and stockholders' equity	($2,859,844)	($2,527,705)	'	($2,339,863)	'	'

Parent_Guarantor_NonGuarantor_5

Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements - Consolidated Condensed Statements of Cash Flows (Detail) (USD $)	9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:	'	'	'	'	'
Net income (loss)	$17,064	$57,265	$37,098	($50,645)	($14,708)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'	'	'	'
Depreciation and amortization	97,674	85,357	113,017	112,136	115,030
Loss on extinguishment of debt	5,218	1,766	2,130	'	7,209
Gain on disposition of assets	-2,759	-2,466	-1,974	-3,659	-4,620
Deferred income tax expense	12,872	8,403	15,837	-48,375	-1,308
Impairment and other charges	'	'	'	170,000	'
Provision for reduction in carrying value of certain assets	'	'	0	1,350	1,952
Expenses not requiring cash	9,928	15,724	22,600	12,833	14,829
Equity in net earnings of subsidiaries	0	0	'	'	'
Change in accounts receivable	-28,605	24,648	15,241	-6,841	20,752
Change in other assets	-1,346	564	-1,522	-1,050	3,231
Change in other assets	'	'	'	'	-594
Change in accrued income taxes	2,877	-3,049	-6,102	2,141	-4,124
Change in liabilities	12,412	-10,185	-2,657	-22,767	-14,992
Net cash provided by (used in) operating activities	125,335	178,027	189,699	225,885	123,550
Cash flows from investing activities:	'	'	'	'	'
Capital expenditures	-102,856	-147,658	-191,543	-190,399	-219,184
Proceeds from the sale of assets	5,533	3,496	3,937	5,535	6,475
Proceeds from insurance settlements	'	'	'	250	'
Acquisition of ITS, net of cash acquired	-117,991	'	'	'	'
Intercompany dividend payment	'	0	'	'	'
Net cash (used in) investing activities	-215,314	-144,162	-187,606	-184,614	-212,709
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'	'	'
Proceeds from debt issuance	350,000	130,000	130,000	50,000	300,000
Proceeds from draw on revolver credit facility	'	'	7,000	'	25,000
Paydown on senior notes	-125,000	-125,000	-125,000	'	-225,000
Paydown on term note	-50,000	-18,000	-18,000	-21,000	-12,000
Paydown on revolver credit facility	'	'	'	-25,000	-42,000
Payment of debt issuance costs	-10,981	-3,516	-4,859	-504	-7,976
Payment of debt extinguishment costs	'	-519	-555	'	-7,466
Proceeds from stock options exercised	'	'	'	183	26
Excess tax benefit from stock-based compensation	531	-572	-662	1,488	1,203
Intercompany advances, net	0	0	'	'	'
Net cash provided by (used in) financing activities	164,550	-17,607	-12,076	5,167	31,787
Net change in cash and cash equivalents	74,571	16,258	-9,983	46,438	-57,372
Cash and cash equivalents at beginning of year	87,886	97,869	97,869	51,431	108,803
Cash and cash equivalents at end of year	162,457	114,127	87,886	97,869	51,431
Parent [Member]	'	'	'	'	'
Cash flows from operating activities:	'	'	'	'	'
Net income (loss)	16,843	57,411	37,313	-50,451	-14,461
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'	'	'	'
Depreciation and amortization	0	0	'	'	'
Loss on extinguishment of debt	5,218	1,766	2,130	'	7,209
Gain on disposition of assets	0	0	'	'	'
Deferred income tax expense	-2,860	5,940	2,257	31,518	-4,845
Expenses not requiring cash	10,494	13,264	16,558	16,411	14,829
Equity in net earnings of subsidiaries	-36,330	-61,553	-43,884	23,484	22,962
Change in accounts receivable	-899	-291	-445	-288,333	16,178
Change in other assets	3,045	-32,874	1,649	62,173	'
Change in other assets	'	'	'	'	-2,505
Change in accrued income taxes	358	-5,068	-4,055	'	'
Change in liabilities	14,222	12,917	3,914	-10,454	-144
Net cash provided by (used in) operating activities	10,091	-8,488	15,437	-215,652	39,223
Cash flows from investing activities:	'	'	'	'	'
Capital expenditures	0	0	'	'	'
Proceeds from the sale of assets	0	0	'	'	'
Acquisition of ITS, net of cash acquired	0	'	'	'	'
Intercompany dividend payment	'	-8,387	-8,387	'	'
Net cash (used in) investing activities	0	-8,387	-8,387	'	'
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'	'	'
Proceeds from debt issuance	350,000	130,000	130,000	50,000	300,000
Proceeds from draw on revolver credit facility	'	'	7,000	'	25,000
Paydown on senior notes	-125,000	-125,000	-125,000	'	-225,000
Paydown on term note	-50,000	-18,000	-18,000	-21,000	-12,000
Paydown on revolver credit facility	'	'	'	-25,000	-42,000
Payment of debt issuance costs	-10,981	-3,516	-4,859	-504	-7,976
Payment of debt extinguishment costs	'	-519	-555	'	-7,466
Proceeds from stock options exercised	'	'	'	183	26
Excess tax benefit from stock-based compensation	531	-572	-662	1,488	1,203
Intercompany advances, net	-127,376	56,280	-8,393	252,320	-115,364
Net cash provided by (used in) financing activities	37,174	38,673	-20,469	257,487	-83,577
Net change in cash and cash equivalents	47,265	21,798	-13,419	41,835	-44,354
Cash and cash equivalents at beginning of year	42,251	55,670	55,670	13,835	58,189
Cash and cash equivalents at end of year	89,516	77,468	42,251	55,670	13,835
Guarantor [Member]	'	'	'	'	'
Cash flows from operating activities:	'	'	'	'	'
Net income (loss)	27,612	63,505	54,961	-49,106	-1,046
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'	'	'	'
Depreciation and amortization	57,335	49,127	65,354	62,744	63,402
Loss on extinguishment of debt	0	0	'	'	'
Gain on disposition of assets	-1,917	-1,168	-775	-2,706	-2,067
Deferred income tax expense	10,479	4,868	15,429	-57,030	2,323
Impairment and other charges	'	'	'	170,000	'
Provision for reduction in carrying value of certain assets	'	'	'	1,350	1,952
Expenses not requiring cash	591	689	33,644	376	'
Equity in net earnings of subsidiaries	0	0	'	'	'
Change in accounts receivable	-7,951	766	-1,788	347,344	-14,763
Change in other assets	4,580	61,320	2,060	-16,724	'
Change in other assets	'	'	'	'	-13,454
Change in accrued income taxes	-85	1,832	220	'	'
Change in liabilities	-2,116	-21,430	-4,158	-53,404	7,793
Net cash provided by (used in) operating activities	88,528	159,509	164,947	402,844	44,140
Cash flows from investing activities:	'	'	'	'	'
Capital expenditures	-66,956	-139,618	-176,333	-174,999	-169,784
Proceeds from the sale of assets	2,751	1,667	2,062	4,335	4,646
Proceeds from insurance settlements	'	'	'	250	'
Acquisition of ITS, net of cash acquired	-292	'	'	'	'
Intercompany dividend payment	'	-4,357	-4,357	'	'
Net cash (used in) investing activities	-64,497	-142,308	-178,628	-170,414	-165,138
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'	'	'
Proceeds from debt issuance	0	0	'	'	'
Paydown on senior notes	0	0	'	'	'
Paydown on term note	0	0	'	'	'
Payment of debt issuance costs	0	0	'	'	'
Payment of debt extinguishment costs	'	0	'	'	'
Excess tax benefit from stock-based compensation	0	0	'	'	'
Intercompany advances, net	-13,781	-13,507	20,492	-230,535	121,547
Net cash provided by (used in) financing activities	-13,781	-13,507	20,492	-230,535	121,547
Net change in cash and cash equivalents	10,250	3,694	6,811	1,895	549
Cash and cash equivalents at beginning of year	11,023	4,212	4,212	2,317	1,768
Cash and cash equivalents at end of year	21,273	7,906	11,023	4,212	2,317
Non-Guarantor [Member]	'	'	'	'	'
Cash flows from operating activities:	'	'	'	'	'
Net income (loss)	8,939	42,011	32,816	25,428	-12,163
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'	'	'	'
Depreciation and amortization	40,339	36,230	47,663	49,392	51,628
Loss on extinguishment of debt	0	0	'	'	'
Gain on disposition of assets	-842	-1,298	-1,199	-953	-2,553
Deferred income tax expense	5,253	-2,405	-1,849	-22,863	1,214
Expenses not requiring cash	-1,157	1,770	-27,602	-3,954	'
Equity in net earnings of subsidiaries	0	0	'	'	'
Change in accounts receivable	-19,755	24,173	17,474	-65,852	19,337
Change in other assets	-8,971	-27,882	-9,200	16,404	'
Change in other assets	'	'	'	'	15,365
Change in accrued income taxes	2,604	187	-2,267	'	'
Change in liabilities	306	-1,672	-2,413	41,091	-22,641
Net cash provided by (used in) operating activities	26,716	71,114	53,423	38,693	50,187
Cash flows from investing activities:	'	'	'	'	'
Capital expenditures	-35,900	-8,040	-15,210	-15,400	-49,400
Proceeds from the sale of assets	2,782	1,829	1,875	1,200	1,829
Acquisition of ITS, net of cash acquired	-117,699	'	'	'	'
Intercompany dividend payment	'	-31,364	-31,364	'	-10,000
Net cash (used in) investing activities	-150,817	-37,575	-44,699	-14,200	-57,571
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'	'	'
Proceeds from debt issuance	0	0	'	'	'
Paydown on senior notes	0	0	'	'	'
Paydown on term note	0	0	'	'	'
Payment of debt issuance costs	0	0	'	'	'
Payment of debt extinguishment costs	'	0	'	'	'
Excess tax benefit from stock-based compensation	0	0	'	'	'
Intercompany advances, net	141,157	-42,773	-12,099	-21,785	-6,183
Net cash provided by (used in) financing activities	141,157	-42,773	-12,099	-21,785	-6,183
Net change in cash and cash equivalents	17,056	-9,234	-3,375	2,708	-13,567
Cash and cash equivalents at beginning of year	34,612	37,987	37,987	35,279	48,846
Cash and cash equivalents at end of year	51,668	28,753	34,612	37,987	35,279
Eliminations [Member]	'	'	'	'	'
Cash flows from operating activities:	'	'	'	'	'
Net income (loss)	-36,330	-105,662	-87,992	23,484	12,962
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'	'	'	'
Depreciation and amortization	0	0	'	'	'
Loss on extinguishment of debt	0	0	'	'	'
Gain on disposition of assets	0	0	'	'	'
Deferred income tax expense	0	0	'	'	'
Expenses not requiring cash	0	1	'	'	'
Equity in net earnings of subsidiaries	36,330	61,553	43,884	-23,484	-22,962
Change in accounts receivable	0	0	'	'	'
Change in other assets	0	0	'	'	'
Change in accrued income taxes	0	0	'	'	'
Change in liabilities	0	0	'	'	'
Net cash provided by (used in) operating activities	0	-44,108	-44,108	'	-10,000
Cash flows from investing activities:	'	'	'	'	'
Capital expenditures	0	0	'	'	'
Proceeds from the sale of assets	0	0	'	'	'
Acquisition of ITS, net of cash acquired	0	'	'	'	'
Intercompany dividend payment	'	44,108	44,108	'	10,000
Net cash (used in) investing activities	0	44,108	44,108	'	10,000
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'	'	'
Proceeds from debt issuance	0	0	'	'	'
Paydown on senior notes	0	0	'	'	'
Paydown on term note	0	0	'	'	'
Payment of debt issuance costs	0	0	'	'	'
Payment of debt extinguishment costs	'	0	'	'	'
Excess tax benefit from stock-based compensation	0	0	'	'	'
Intercompany advances, net	0	0	'	'	'
Net cash provided by (used in) financing activities	0	0	'	'	'
Net change in cash and cash equivalents	0	0	'	'	'
Cash and cash equivalents at beginning of year	0	0	0	'	'
Cash and cash equivalents at end of year	$0	$0	$0	$0	'

Selected_Quarterly_Financial_D2

Selected Quarterly Financial Data - Schedule of Selected Quarterly Financial Data (Detail) (USD $)	3 Months Ended									9 Months Ended		12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Selected Quarterly Financial Data [Line Items]	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Revenues	$237,762	$157,187	$165,301	$178,925	$176,569	$181,066	$176,589	$172,812	$156,179	$630,918	$520,795	$677,982	$686,646	$659,475
Operating gross margin	48,139	16,405	34,038	46,440	54,018	44,399	49,966	40,797	21,204	118,908	134,496	150,901	156,366	73,167
Operating income	35,045	-8,317	25,739	40,388	49,013	-133,215	41,959	33,215	15,402	72,218	115,140	106,823	-42,639	45,107
Net income (loss) attributable to controlling interest	$7,970	($20,098)	$10,936	$20,083	$26,392	($90,176)	$20,725	$14,173	$4,827	$16,843	$57,411	$37,313	($50,451)	($14,461)
Basic earnings per share - net income (loss)	$0.07	($0.17)	$0.09	$0.17	$0.23	($0.77)	$0.18	$0.12	$0.04	$0.14	$0.49	$0.32	($0.43)	($0.13)
Diluted earnings per share - net income (loss)	$0.07	($0.17)	$0.09	$0.17	$0.22	($0.77)	$0.18	$0.12	$0.04	$0.14	$0.48	$0.31	($0.43)	($0.13)

Schedule_II_Valuation_and_Qual

Schedule II - Valuation and Qualifying Accounts (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts and notes [Member]	'	'	'
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'
Balance at beginning of year	$1,544	$7,020	$4,095
Charged to cost and expenses	4,264	2,258	3,244
Charged to other accounts	3,195	-2,034	-211
Deductions	-886	-5,700	-108
Balance at end of year	8,117	1,544	7,020
Allowance for obsolete rig materials and supplies [Member]	'	'	'
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'
Balance at beginning of year	316	309	'
Charged to cost and expenses	'	26	309
Deductions	-4	-19	'
Balance at end of year	312	316	309
Deferred tax valuation allowance [Member]	'	'	'
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'
Balance at beginning of year	6,467	5,532	5,194
Charged to cost and expenses	-1,662	2,542	338
Charged to other accounts	'	-1,607	'
Balance at end of year	$4,805	$6,467	$5,532

General_Additional_Information

General - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended			3 Months Ended	12 Months Ended	2 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2013	Dec. 31, 2012	Jun. 30, 2013	Sep. 30, 2013
	Country		Country		Rigs			Exxon Neftegas Limited [Member]	Exxon Neftegas Limited [Member]	ITS [Member]	ITS [Member]
	Rigs		Rigs		Country
Revenue, Major Customer [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Number of countries in which Entity has operated since inception	50	'	50	'	50	'	'	'	'	'	'
Number of countries in which entity operates	'	'	'	'	12	'	'	'	'	'	'
Number of countries with international rental tools operations	10	'	10	'	'	'	'	'	'	'	'
Barge drilling rigs	13	'	13	'	14	'	'	'	'	'	'
Land rings	23	'	23	'	24	'	'	'	'	'	'
Number of rigs held for sale	5	'	5	'	'	'	'	'	'	'	'
Percentage accounted for under the equity method	50.00%	'	50.00%	'	50.00%	'	'	'	'	'	'
Fair value adjustments for indefinite lived intangible assets	'	'	'	'	'	'	'	'	'	'	$10,000,000
Fair value adjustments for finite lived intangible assets	'	'	'	'	'	'	'	'	'	'	200,000
Weighted average useful life	'	'	'	'	'	'	'	'	'	'3 years 4 months 24 days	'3 years
Reimbursement cost	16,200,000	12,100,000	46,500,000	29,800,000	44,900,000	64,200,000	40,100,000	'	'	'	'
Deposits in domestic bank	117,100,000	'	117,100,000	'	12,200,000	10,200,000	'	'	'	'	'
Deposits in foreign banks	51,800,000	'	51,800,000	'	34,500,000	38,400,000	'	'	'	'	'
Exposure per occurrence	'	'	250,000	'	250,000	'	'	'	'	'	'
Percentage of revenue from major customer	'	'	'	'	'	'	'	14.30%	11.80%	'	'
Interest costs capitalized	$700,000	$2,500,000	$1,700,000	$7,900,000	$10,200,000	$19,300,000	$13,500,000	'	'	'	'

Acquisitions_ITS_Additional_In

Acquisitions ITS - Additional Information (Detail) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

1 Months Ended

2 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Jun. 30, 2011

Mar. 31, 2011

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Apr. 18, 2013

Apr. 22, 2013

Jun. 30, 2013

Sep. 30, 2013

Apr. 22, 2013

Sep. 30, 2013

Jul. 30, 2013

ITS [Member]

Accounts Receivable [Member]

Term Note Due April 2018 [Member]

Business Acquisition [Line Items]

Cash paid to, or on behalf of, ITS and its equity holders

$101,000,000

Cash paid for acquisition

24,000,000

Fair value of contingent consideration deposited in escrow for assets not acquired (1)

5,000,000

[1]

Assets, Fair Value Disclosure

Acquisition related costs

4,800,000

Consulting expenses

19,200,000

Debt issuance costs

5,400,000

Long-term Debt

653,968,000

479,205,000

482,723,000

653,968,000

479,205,000

482,723,000

125,000,000

Proceeds from issuance of term note

225,000,000

Debt instrument fixed interest rate

7.50%

Deferred acquisition costs

5,200,000

5,300,000

Revenues

237,762,000

157,187,000

165,301,000

178,925,000

176,569,000

181,066,000

176,589,000

172,812,000

156,179,000

630,918,000

520,795,000

677,982,000

686,646,000

659,475,000

58,500,000

Net income

$8,118,000

$10,831,000

$17,064,000

$57,265,000

$37,098,000

($50,645,000)

($14,708,000)

$4,400,000

[1]

Based on the terms of the Agreement, $5.0 million of the $24.0 million in escrow to be paid to the seller is contingent upon certain future liabilities that could become due by ITS in certain jurisdictions. Any payments in relation to these liabilities will be deducted from the $5.0 million escrow amount and the net balance of the escrow will be paid to the seller. We estimate that the entire $5.0 million in escrow will be paid to the seller, and therefore, the estimated fair value of the consideration in escrow related to these liabilities is $5.0 million. We do not expect to receive any amount back from escrow, and therefore did not record a receivable from the escrow. Any changes to the fair value of the contingent consideration in the future of less than $5.0 million will result in recording a receivable from escrow. The receivable will be recorded at fair value. As of September 30, 2013, the fair value of the receivable is $0.0 million.

Acquisitions_ITS_Fair_Value_of

Acquisitions ITS - Fair Value of Consideration Transferred (Detail) (ITS [Member], USD $)	1 Months Ended
In Thousands, unless otherwise specified	Apr. 22, 2013
ITS [Member]	'
Business Acquisition [Line Items]	'
Cash paid to, or on behalf of, ITS and its equity holders	$101,000
Cash deposited in escrow	19,000
Fair value of contingent consideration deposited in escrow for assets not acquired	5,000	[1]
Total fair value of the consideration transferred	$125,000

[1]	Based on the terms of the Agreement, $5.0 million of the $24.0 million in escrow to be paid to the seller is contingent upon certain future liabilities that could become due by ITS in certain jurisdictions. Any payments in relation to these liabilities will be deducted from the $5.0 million escrow amount and the net balance of the escrow will be paid to the seller. We estimate that the entire $5.0 million in escrow will be paid to the seller, and therefore, the estimated fair value of the consideration in escrow related to these liabilities is $5.0 million. We do not expect to receive any amount back from escrow, and therefore did not record a receivable from the escrow. Any changes to the fair value of the contingent consideration in the future of less than $5.0 million will result in recording a receivable from escrow. The receivable will be recorded at fair value. As of September 30, 2013, the fair value of the receivable is $0.0 million.

Acquisitions_ITS_Preliminary_A

Acquisitions ITS - Preliminary Allocation of Consideration Transferred (Detail) (USD $)	3 Months Ended	9 Months Ended		12 Months Ended			2 Months Ended	9 Months Ended
	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2013	Sep. 30, 2013	Apr. 22, 2013
	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	ITS [Member]	ITS [Member]	ITS [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'
Cash and cash equivalents	'	'	'	'	'	'	'	'	$7,009,000
Accounts and notes receivable, net	'	'	'	'	'	'	'	'	48,795,000	[1]
Other current assets	'	'	'	'	'	'	'	'	1,803,000
Accounts payable and accrued liabilities	'	'	'	'	'	'	'	'	-39,156,000
Accrued income taxes	'	'	'	'	'	'	'	'	-1,251,000
Working capital excluding rig materials and supplies	'	'	'	'	'	'	'	'	17,200,000
Rig materials and supplies	'	'	'	'	'	'	'	'	11,514,000
Property, plant and equipment, net	'	'	'	'	'	'	'	'	70,339,000	[2]
Investment in joint venture	'	'	'	'	'	'	'	'	4,134,000
Other noncurrent assets	'	'	'	'	'	'	'	'	2,818,000
Total tangible assets	'	'	'	'	'	'	'	'	106,005,000
Deferred income tax assets - current	'	'	'	'	'	'	'	'	222,000
Deferred income tax assets - noncurrent	'	'	'	'	'	'	'	'	14,153,000	[3]
Intangible assets	'	'	'	'	'	'	'	'	'
Trade name, developed technology, and customer relationship	'	'	'	'	'	'	'	'	10,000,000
Indefinite-lived intangible assets	'	'	'	'	'	'	'	'	200,000
Total assets acquired	'	'	'	'	'	'	'	'	130,580,000
Other long-term liabilities	'	'	'	'	'	'	'	'	-211,000
Long-term deferred tax liability	'	'	'	'	'	'	'	'	-2,661,000
Net assets acquired	'	'	'	'	'	'	'	'	127,708,000
Less: Noncontrolling interest	'	'	'	'	'	'	'	'	-2,708,000	[4]
Total consideration transferred	'	'	'	'	'	'	'	'	125,000,000
Accounts and notes receivable, gross	'	'	'	'	'	'	'	'	54,700,000
Adjustment to record property, plant and equipment to fair value	170,000,000	'	'	'	170,000,000	'	43,700,000	'	'
Increase in deferred income tax asset	'	12,872,000	8,403,000	15,837,000	-48,375,000	-1,308,000	7,700,000	'	'
Intangible assets acquired	'	'	'	'	'	'	'	'	10,000,000
Weighted average useful life	'	'	'	'	'	'	'3 years 4 months 24 days	'3 years	'
Impairment of non-controlling interest	'	'	'	'	'	'	$1,000,000	'	'

[1]	Gross contractual amounts receivable totaled $54.7 million as of the acquisition date.
[2]	We recorded an adjustment of $43.7 million to reduce the historical carrying value of the acquired property, plant and equipment to its estimated fair value.
[3]	In connection with the ITS Acquisition, we recorded a $7.7 million adjustment to increase deferred income tax assets primarily related to the differences between acquisition date estimated fair value and tax basis of acquired property, plant and equipment.
[4]	We recorded an adjustment of $1.0 million to write-down the noncontrolling interest to its estimated fair value. The estimated fair value of the noncontrolling interest was calculated as a percentage of the net assets acquired related to certain subsidiaries in which ITS holds less than a 100 percent controlling interest. The fair value of the net assets of these subsidiaries was primarily based on the income approach valuation model.

Acquisitions_ITS_Supplemental_

Acquisitions ITS - Supplemental Proforma (Detail) (USD $)	9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Net income attributable to Parker Drilling	$32,629	$55,073
Basic number of shares	119,443,260	117,458,365
Diluted number of shares	121,693,781	118,810,195
ITS [Member]	'	'
Revenue	671,738	614,679
Net income	$33,081	$54,927
Earnings per share - basic	$0.27	$0.47
Earnings per share - diluted	$0.27	$0.46

Earnings_Per_Share_EPS_Summary

Earnings Per Share (EPS) - Summary of Earnings Per Share (EPS) (Detail) (USD $)	3 Months Ended									9 Months Ended		12 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income	$7,970	($20,098)	$10,936	$20,083	$26,392	($90,176)	$20,725	$14,173	$4,827	$16,843	$57,411	$37,313	($50,451)	($14,461)
Basic EPS (in shares)	119,990,196	'	118,109,214	'	'	'	'	'	'	119,443,260	117,458,365	117,721,135	116,081,590	114,258,965
Stock options and restricted stock (in shares)	1,684,395	'	1,091,805	'	'	'	'	'	'	2,250,521	1,351,830	1,372,455	'	'
Diluted EPS (in shares)	121,674,591	'	119,201,019	'	'	'	'	'	'	121,693,781	118,810,195	119,093,590	116,081,590	114,258,965
Basic EPS (in dollars per share)	$0.07	($0.17)	$0.09	$0.17	$0.23	($0.77)	$0.18	$0.12	$0.04	$0.14	$0.49	$0.32	($0.43)	($0.13)
Stock options and restricted stock (in dollars per share)	'	'	'	'	'	'	'	'	'	'	($0.01)	'	'	'
Diluted EPS (in dollars per share)	$0.07	($0.17)	$0.09	$0.17	$0.22	($0.77)	$0.18	$0.12	$0.04	$0.14	$0.48	$0.31	($0.43)	($0.13)
Stock options and restricted stock (in dollars per share)	$0.14	($0.01)	$0.09	'	'	'	'	'	'	$0.14	$0.09	($0.01)	'	'

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income Reclassifications [Roll Forward]	'	'	'	'
Beginning balance	'	'	$0	'
Current period other comprehensive income	1,521	0	957	0
Ending balance	$957	'	$957	'

Reportable_Segments_Additional

Reportable Segments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
	Segment
Segment Information [Line Items]	'
Number of operating segments	5

Accounting_for_Uncertainty_in_1

Accounting for Uncertainty in Income Taxes - Additional Information (Detail) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Income Tax Disclosure [Line Items]	'	'	'	'
Liability for unrecognized tax	$10,500,000	($10,030,000)	$12,000,000	($15,492,000)
Unrecognized tax favorable impact on effective tax rate	3,800,000	3,200,000	5,200,000	'
Accrued interest and penalties applied to uncertain tax positions	$7,700,000	$7,000,000	'	'

Parent_Guarantor_NonGuarantor_6

Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements - Statement of Comprehensive Income (Loss) (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Scheduleof Condensed Statementof Comprehensive Income [Line Items]	'	'	'	'	'	'	'
Net income	$8,118	$10,831	$17,064	$57,265	$37,098	($50,645)	($14,708)
Currency translation difference on related borrowings	-577	0	-1,542	0	'	'	'
Currency translation difference on foreign currency net investments	2,098	0	2,499	0	'	'	'
Total other comprehensive gain, net of tax:	1,521	0	957	0	'	'	'
Comprehensive income	9,639	10,831	18,021	57,265	37,098	-50,645	14,708
Comprehensive (income) attributable to noncontrolling interest	-53	0	-83	0	'	'	'
Comprehensive income attributable to controlling interest	9,586	10,831	17,938	57,265	'	'	'
Parent [Member]	'	'	'	'	'	'	'
Scheduleof Condensed Statementof Comprehensive Income [Line Items]	'	'	'	'	'	'	'
Net income	7,970	10,936	16,843	57,411	37,313	-50,451	-14,461
Currency translation difference on related borrowings	0	'	0	'	'	'	'
Total other comprehensive gain, net of tax:	0	'	0	'	'	'	'
Comprehensive income	7,970	'	16,843	'	'	'	'
Comprehensive (income) attributable to noncontrolling interest	0	'	0	'	'	'	'
Comprehensive income attributable to controlling interest	7,970	'	16,843	'	'	'	'
Guarantor [Member]	'	'	'	'	'	'	'
Scheduleof Condensed Statementof Comprehensive Income [Line Items]	'	'	'	'	'	'	'
Net income	10,817	16,694	27,612	63,505	54,961	-49,106	-1,046
Currency translation difference on related borrowings	0	'	0	'	'	'	'
Total other comprehensive gain, net of tax:	0	'	0	'	'	'	'
Comprehensive income	10,817	'	27,612	'	'	'	'
Comprehensive (income) attributable to noncontrolling interest	0	'	0	'	'	'	'
Comprehensive income attributable to controlling interest	10,817	'	27,612	'	'	'	'
Non-Guarantor [Member]	'	'	'	'	'	'	'
Scheduleof Condensed Statementof Comprehensive Income [Line Items]	'	'	'	'	'	'	'
Net income	11,653	-6,203	8,939	42,011	32,816	25,428	-12,163
Currency translation difference on related borrowings	-577	'	-1,542	'	'	'	'
Currency translation difference on foreign currency net investments	2,098	'	2,499	'	'	'	'
Total other comprehensive gain, net of tax:	1,521	'	957	'	'	'	'
Comprehensive income	13,174	'	9,896	'	'	'	'
Comprehensive (income) attributable to noncontrolling interest	-53	'	-83	'	'	'	'
Comprehensive income attributable to controlling interest	13,121	'	9,813	'	'	'	'
Eliminations [Member]	'	'	'	'	'	'	'
Scheduleof Condensed Statementof Comprehensive Income [Line Items]	'	'	'	'	'	'	'
Net income	-22,322	-10,596	-36,330	-105,662	-87,992	23,484	12,962
Currency translation difference on related borrowings	0	'	0	'	'	'	'
Total other comprehensive gain, net of tax:	0	'	0	'	'	'	'
Comprehensive income	-22,322	'	-36,330	'	'	'	'
Comprehensive (income) attributable to noncontrolling interest	0	'	0	'	'	'	'
Comprehensive income attributable to controlling interest	($22,322)	'	($36,330)	'	'	'	'