Subsequent Events - Additional Information (Detail)				1 Months Ended					1 Months Ended		1 Months Ended				1 Months Ended				1 Months Ended
	Mar. 31, 2013 USD ($)	Mar. 31, 2013 RUB	Dec. 31, 2012 USD ($)	Jul. 31, 2008 Loan Agreement Alfa Bank USD ($)	Jul. 31, 2008 Loan Agreement Alfa Bank EUR (€)	Mar. 15, 2013 Notes Due Two Thousand Thirteen USD ($)	Mar. 31, 2013 Notes Due Two Thousand Thirteen Roust Trading Limited USD ($)	Mar. 01, 2013 Notes Due Two Thousand Thirteen Roust Trading Limited USD ($)	Apr. 30, 2013 Issuance of Debt Bilateral Facility Agreement USD ($) Installment	Apr. 07, 2013 Issuance of Debt Bilateral Facility Agreement USD ($)	Apr. 30, 2013 Issuance of Debt Bilateral Facility Agreement Maximum Agreement	Apr. 07, 2013 Issuance of Debt Bilateral Facility Agreement Maximum USD ($)	Jun. 05, 2013 Subsequent Event USD ($)	Jun. 05, 2013 Subsequent Event Roust Trading Limited	Jun. 05, 2013 Subsequent Event Senior Secured Notes Due 2018 USD ($)	Jun. 05, 2013 Subsequent Event Convertible Junior Secured Notes Due 2018 USD ($)	May 28, 2013 Subsequent Event Loan Agreement Alfa Bank USD ($)	May 28, 2013 Subsequent Event Loan Agreement Alfa Bank RUB	Jun. 07, 2013 Subsequent Event Loan Agreement MKB Bank USD ($)	Jun. 07, 2013 Subsequent Event Loan Agreement MKB Bank RUB
Subsequent Event [Line Items]
Debt defaulted, principal amount						$ 257,900,000	$ 20,000,000
Bilateral Facility Agreement, principal amount	50,000,000		0					50,000,000				100,000,000			465,000,000	200,000,000
Debt instrument maturity year															2018	2018
Debt issuance date															Jun. 19, 2013	Jun. 19, 2013
Common Stock, shares issued	76,107,506	76,107,506	76,047,506										10,000
Percentage of voting securities control														100.00%
Common Stock, shares authorized	120,000,000	120,000,000	120,000,000										90,000
Common Stock, par value	$ 0.01		$ 0.01										$ 0.01
Preferred Stock, shares authorized	1,000,000	1,000,000	1,000,000										10,000
Preferred Stock, par value	$ 0.01		$ 0.01										$ 0.01
Number of bilateral facility agreement											5
Interest rate percentage on issued debt										13.75%
Bilateral Facility Agreement,term									1 year
Bilateral Facility Agreement. Arrangement fee									500,000
Bilateral Facility Agreement. commitment fee									10,300,000
Bilateral Facility Agreement. Number of installments payments									3
Bilateral Facility Agreement. Break-up fee										15,000,000
Maximum borrowing capacity				25,600,000	20,000,000												60,000,000	2,000,000,000	30,000,000	1,000,000,000
Initiation date				July 22, 2008	July 22, 2008														June 7, 2013	June 7, 2013
Financial statements guarantees	$ 765,000,000	25,400,000,000