Basis Of Presentation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
Dec. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2011 As Reported [Member]	Jun. 30, 2010 As Reported [Member]	Sep. 30, 2010 As Reported [Member]	Dec. 31, 2010 As Reported [Member]	Mar. 31, 2011 As Reported [Member]	Mar. 31, 2010 As Reported [Member]	Jun. 30, 2011 As Adjusted [Member]	Jun. 30, 2010 As Adjusted [Member]	Sep. 30, 2010 As Adjusted [Member]	Dec. 31, 2010 As Adjusted [Member]	Mar. 31, 2011 As Adjusted [Member]	Mar. 31, 2010 As Adjusted [Member]	Jun. 30, 2011 Change [Member]	Jun. 30, 2010 Change [Member]	Sep. 30, 2010 Change [Member]	Dec. 31, 2010 Change [Member]	Mar. 31, 2011 Change [Member]	Mar. 31, 2010 Change [Member]
Basis of Presentation [Line Items]
Foreign currency losses	$ 153	$ 605
Net cash provided by operating activities		43,883	44,708	6,319	23,854	31,932	46,056	68,500	47,224	4,755	23,138	30,584	44,708	67,200	45,654	1,564	716	1,348	1,348	1,300	1,570
Net cash provided by (used in) investing activities		$ 17,423	$ 15,386	$ (28,994)	$ 13,046	$ 22,556	$ 14,038	$ 61,300	$ (61,075)	$ (27,430)	$ 13,762	$ 23,904	$ 15,386	$ 60,000	$ (59,505)	$ 1,564	$ 716	$ 1,348	$ 1,348	$ 1,300	$ 1,570

The aggregate foreign currency transaction gain (loss) (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains (losses) may be disclosed as dealer gains (losses).

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

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