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Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012
Future minimum lease payments under operating leases
2012	$ 5,400
2013	7,149
2014	6,695
2015	6,822
2016	6,129
Thereafter	22,128
Total minimum Payments	$ 54,323

X

- Definition

The total of future contractually required payments on leases defined as operating.

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- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within one year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fourth year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the third year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the second year of the balance sheet date relating to leases defined as operating.

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