Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Statement of Income and Comprehensive Income [Abstract]
Net income	$ 13,258	$ 12,396	$ 24,556	$ 23,876
Other comprehensive income (loss), net of tax :
Unrealized losses on hedging derivatives	(54)	(207)	(1)	(354)
Unrealized losses on available for sale securities				(4)
Realized gains on available for sale securities				(19)
Comprehensive income	$ 13,204	$ 12,189	$ 24,555	$ 23,499

The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes.

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Appreciation or loss in value (before reclassification adjustment) of the total of unsold securities during the period being reported on, net of tax. Reclassification adjustments include: (1) the unrealized holding gain or loss, net of tax, at the date of the transfer for a debt security from the held-to-maturity category transferred into the available-for-sale category. Also includes the unrealized gain or loss at the date of transfer for a debt security from the available-for-sale category transferred into the held-to-maturity category; (2) the unrealized gains or losses realized upon the sale of securities, after tax; and (3) the unrealized gains or losses realized upon the write-down of securities, after tax.

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