CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 13,788us-gaap_NetIncomeLoss	$ 11,984us-gaap_NetIncomeLoss
OTHER COMPREHENSIVE INCOME (LOSS):
Change in fair value of derivatives used for cash flow hedges	(396)	(339)
Reclassification adjustment for derivative losses realized in income	101	100
Change in unrealized gain (loss) on securities available for sale	1,238	2
Change in unrealized gain (losses) on securities available for sale for which a portion of an other-than-temporary impairment has been recognized in earnings	(22)	54
Net unrealized gains (losses)	921	(183)
Tax effect	(322)us-gaap_OtherComprehensiveIncomeLossTax	63us-gaap_OtherComprehensiveIncomeLossTax
Total other comprehensive income (loss), net of tax	599	(120)
COMPREHENSIVE INCOME	$ 14,387us-gaap_ComprehensiveIncomeNetOfTax	$ 11,864us-gaap_ComprehensiveIncomeNetOfTax

Amount before tax of unrealized holding gain (loss) on available-for-sale securities.

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Before tax amount of unrealized gains (losses) on securities available for sale for which a portion of an other-than-temporary impairment has been recognized in earnings.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount before tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount before tax and reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.

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