CASH AND CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS; BANK OVERDRAFT (Tables)

12 Months Ended

Dec. 31, 2012

CASH AND CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS; BANK OVERDRAFT

Schedule of cash and cash equivalents

	December 31,
	2011	2012
Cash and cash equivalents:
Russian ruble bank accounts	$6,434	$23,519
US dollar bank accounts	4,479	31,021
Other	1,418	641
Total cash and cash equivalents	$12,331	$55,181

Schedule of short-term investments

	December 31,
	2011				2012
	Annual interest rate		Amount		Annual interest rate		Amount
Short-term investments:
Ruble-denominated deposits		4.1%–8.7%	$	102,068		7.65%–9.25%	$	131,449
US dollar-denominated deposits		2.1%–2.2%		15,165				—
Total Short-term investments			$	117,233			$	131,449