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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 25,248	$ 15,460
Other comprehensive income, before tax:
Changes in unrealized loss on debt securities available-for-sale	(19,162)	(9,433)
Changes in unrealized loss on derivative hedges	0	6,573
Income taxes related to other comprehensive income:
Changes in unrealized loss on debt securities available-for-sale	4,931	3,540
Changes in unrealized gains on derivative hedges	0	(2,588)
Total other comprehensive loss	(14,231)	(1,908)
Total comprehensive income	$ 11,017	$ 13,552

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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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