Borrowings - Additional Information (Detail)	12 Months Ended													1 Months Ended		12 Months Ended										12 Months Ended	1 Months Ended						12 Months Ended		1 Months Ended		12 Months Ended					1 Months Ended		12 Months Ended						1 Months Ended		12 Months Ended				12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2012 RUB	Aug. 02, 2012 USD ($)	Aug. 02, 2012 HUF	Dec. 31, 2012 Related Party USD ($)	Dec. 31, 2012 Related Party PLN	Dec. 31, 2011 Related Party USD ($)	Dec. 31, 2011 Related Party PLN	Dec. 02, 2009 9.125% Senior Secured Notes Due 2016 USD ($)	Dec. 09, 2010 8.875% Senior Secured Notes Due 2016	Dec. 02, 2009 8.875% Senior Secured Notes Due 2016 EUR (€)	Mar. 31, 2008 Convertible Senior Notes Due 2013 USD ($)	Mar. 07, 2008 Convertible Senior Notes Due 2013 USD ($)	Dec. 31, 2012 Convertible Senior Notes Due 2013 USD ($)	Dec. 31, 2011 Convertible Senior Notes Due 2013 USD ($)	Dec. 31, 2010 Convertible Senior Notes Due 2013 USD ($)	Dec. 31, 2012 Senior Notes due March 18, 2013 (New Debt) USD ($)	Dec. 31, 2011 Senior Notes due March 18, 2013 (New Debt) USD ($)	Mar. 15, 2013 Notes Due Two Thousand Thirteen Restructuring Transactions USD ($)	Dec. 31, 2012 Convertible Senior Notes due 2016 USD ($)	Dec. 31, 2011 Convertible Senior Notes due 2016 USD ($)	Dec. 09, 2010 Additional Debt USD ($)	Dec. 09, 2010 Additional Debt EUR (€)	Dec. 31, 2012 Convertible Note USD ($) Tranche	Jan. 04, 2010 Senior Secured Notes due 2016 USD ($)	Jan. 04, 2010 Senior Secured Notes due 2016 EUR (€)	Dec. 09, 2010 Senior Secured Notes due 2016	Dec. 02, 2009 Senior Secured Notes due 2016 8.875% Senior Secured Notes Due 2016 USD ($)	Dec. 31, 2012 Zenit Bank, Alfa Bank And Raiffeisen Bank USD ($)	Dec. 31, 2012 Zenit Bank, Alfa Bank And Raiffeisen Bank EUR (€)	Dec. 31, 2012 Alfa Bank USD ($) Tranche	Dec. 31, 2012 Alfa Bank EUR (€)	Jul. 31, 2008 Alfa Bank Loan Agreement USD ($)	Jul. 31, 2008 Alfa Bank Loan Agreement EUR (€)	Dec. 31, 2012 Alfa Bank Loan Agreement USD ($)	Dec. 31, 2012 Alfa Bank Loan Agreement EUR (€)	Dec. 31, 2012 Alfa Bank Loan Agreement Minimum	Dec. 31, 2012 Alfa Bank Loan Agreement Maximum	Dec. 31, 2012 Zenit Bank Tranche	Aug. 31, 2012 Zenit Bank Loan Agreement USD ($)	Aug. 31, 2012 Zenit Bank Loan Agreement EUR (€)	Dec. 31, 2012 Zenit Bank Loan Agreement USD ($)	Dec. 31, 2012 Zenit Bank Loan Agreement EUR (€)	Dec. 31, 2012 Zenit Bank Loan Agreement Minimum	Dec. 31, 2012 Zenit Bank Loan Agreement Maximum	Dec. 31, 2012 Raiffeisen Bank USD ($)	Dec. 31, 2012 Raiffeisen Bank EUR (€)	Oct. 30, 2012 Raiffeisen Bank Loan Agreement USD ($) Tranche	Oct. 30, 2012 Raiffeisen Bank Loan Agreement EUR (€) Tranche	Dec. 31, 2012 Raiffeisen Bank Loan Agreement USD ($)	Dec. 31, 2012 Raiffeisen Bank Loan Agreement EUR (€)	Dec. 31, 2012 Unicredit And JSC Grand Invest Bank Loan Agreement USD ($)	Dec. 31, 2012 Unicredit And JSC Grand Invest Bank Loan Agreement RUB	Dec. 31, 2012 MKB Bank Loan Agreement USD ($)	Dec. 31, 2012 MKB Bank Loan Agreement RUB	Dec. 31, 2012 Outstanding Loan Balance Loan Agreement USD ($)	Dec. 31, 2012 Outstanding Loan Balance Loan Agreement RUB	Dec. 31, 2012 JSC Grand Invest Bank Loan Agreement USD ($)	Dec. 31, 2012 JSC Grand Invest Bank Loan Agreement RUB	Dec. 31, 2012 JSC Grand Invest Bank Loan Agreement Term Loan One	Dec. 31, 2012 JSC Grand Invest Bank Loan Agreement Term Loan Two	Dec. 31, 2012 Sberbank Loan Agreement USD ($)	Dec. 31, 2012 Sberbank Loan Agreement RUB	Dec. 31, 2012 Sberbank Overdraft Agreement USD ($)	Dec. 31, 2012 Sberbank Overdraft Agreement RUB	Feb. 06, 2012 Sberbank Overdraft Agreement USD ($)	Feb. 06, 2012 Sberbank Overdraft Agreement RUB
Line of Credit Facility [Line Items]
Outstanding liability																															$ 37,100,000	€ 28,100,000					$ 17,300,000	€ 13,100,000						$ 13,200,000	€ 10,000,000							$ 6,600,000	€ 5,000,000	$ 88,700,000	2,696,100,000	$ 29,600,000	900,000,000	$ 23,800,000	724,000,000	$ 11,500,000	350,000,000					$ 500,000	15,000,000
Outstanding liability including accrued interest																																29,600,000						14,000,000							10,300,000								5,300,000		2,702,000,000		903,500,000		725,600,000						248,800,000
Initiation date	December 24, 2012																																		July 22, 2008	July 22, 2008						August 16, 2012	August 16, 2012							October 26, 2012	October 26, 2012					July 19, 2012	July 19, 2012	July 25, 2012	July 25, 2012			November 25, 2011	December 19, 2012	November 23, 2012	November 23, 2012	February 6, 2012	February 6, 2012
Maturity date	March 7, 2013																																		October 18, 2014	October 18, 2014						April 25, 2014	April 25, 2014							September 30, 2013	September 30, 2013					February 25, 2013	February 25, 2013	February 28, 2013	February 28, 2013	November 22, 2013	November 22, 2013			November 22, 2013	November 22, 2013	February 5, 2013	February 5, 2013
Maximum borrowing capacity	16,400,000			500,000,000	2,300,000	500,000,000																											36,900,000	28,000,000	26,400,000	20,000,000						13,200,000	10,000,000					39,600,000	30,000,000	6,600,000	5,000,000													8,200,000	248,000,000			2,000,000	60,000,000
Loan agreement, number of tranches																										6							11	11							4									4	4
Date of tranches release, start date																																					September 26, 2012	September 26, 2012						August 16, 2012	August 16, 2012							October 29, 2012	October 29, 2012
Date of tranches release, end date																																					December 27, 2012	December 27, 2012						October 26, 2012	October 26, 2012							November 20, 2012	November 20, 2012
Repayable date																																							March 26, 2013	September 27, 2013						January 25, 2013	March 15, 2013					September 30, 2013	September 30, 2013
Additional borrowing exceeding the maximum borrowing capacity																																	130,000	100,000
Term loan facility utilized portion	15,100,000			459,100,000	2,100,000	449,900,000
Liability for recourse from factored receivables							2,800,000	8,600,000	7,500,000	23,000,000
Debt instrument issuance amount	70,000,000										380,000,000		380,000,000		310,000,000				70,000,000					65,900,000	50,000,000					491,100,000
Interest rate percentage on issued debt	3.00%										9.125%	8.875%	8.875%		3.00%				3.00%											8.875%
Year of maturity of debt															2013
Initial conversion rate shares															14,711,300
Principal amount of initial conversion rate															1,000
Repurchased amount of convertible notes																										52,100,000
Principal amount of convertible notes																										50,200,000
Accrued interest	7,100,000	7,000,000														2,100,000
Fair value of notes																138,100,000	248,000,000					590,900,000	702,700,000
Liability component of convertible senior Notes															290,300,000	256,922,000	304,645,000
Equity component of convertible senior Notes															19,700,000
Discount rate used to calculate present value														4.50%
Equity component recorded as additional paid-in capital														12,800,000
Deferred income taxes	(3,605,000)	39,042,000	(27,944,000)											6,900,000
Accumulated amortization related to the debt discount																18,900,000	15,400,000
Pre tax non-cash interest expense recognized in consolidated statement of operations and comprehensive income																3,500,000	4,300,000	4,100,000
Debt defaulted, principal amount																					257,900,000
Redemption of senior secured notes																											323,700,000	245,400,000
Debt instrument maturity year																													2016
Common stock to be purchased, price per share																			$ 5.25
Debt instrument maturity date																			Mar. 18, 2013
Common stock to be purchased, shares																			13,300,000
Common stock price per share for interest payable on debt security																			$ 3.44
Fair value of debt security	70,400,000
Accrued Interest Payments On Notes																			600,000
Unamortized debt discount																			$ 13,600,000	$ 16,500,000