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Borrowings (Interest Costs Recognized On Convertible Notes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Borrowings [Abstract]
Contractual interest coupon	$ 906
Amortization of debt discount	409
Total	$ 1,315

The component of interest expense representing the noncash expenses charged against earnings in the period to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate caption: Noncash Interest Expense.

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