FAIR VALUE MEASUREMENTS (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
FAIR VALUE MEASUREMENTS
Outstanding convertible notes	$ 111,616,000	$ 111,616,000
Estimated fair value of convertible notes	60,300,000	59,200,000
Long-term bank borrowings (including the current portions)	238,981,000	193,600,000
Fair value of long-term borrowings (including the current portions)	240,300,000	184,000,000
Recurring basis \| Total Fair Value and Carrying Value on the Balance Sheet \| Cross currency forward exchange contracts
FAIR VALUE MEASUREMENTS
Derivative assets	1,933,000	660,000
Derivative liabilities		(975,000)
Assets and liabilities, net	1,933,000	(315,000)
Recurring basis \| Significant Other Observable Inputs (Level 2) \| Cross currency forward exchange contracts
FAIR VALUE MEASUREMENTS
Derivative assets	1,933,000	660,000
Derivative liabilities		(975,000)
Assets and liabilities, net	$ 1,933,000	$ (315,000)

Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

+ References+ Details

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References+ Details

- Definition

Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

+ References+ Details

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References+ Details