CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) (Parenthetical) (USD $) In Thousands	3 Months Ended
Jun. 30, 2011	Jun. 30, 2010
COSTS AND EXPENSES
Costs and expenses, related parties	$ 0	$ 294

Costs of sales and operating expenses for the period incurred from transactions with related parties.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2)
-SubTopic 10
-Topic 225
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Name:	us-gaap_CostsAndExpensesRelatedParty
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration