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Note 22 - Condensed Financial Information (Parent Company Only) - Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income	$ 92,940	$ 96,814	$ 74,364
OTHER COMPREHENSIVE INCOME
Equity in other comprehensive income (loss) income of subsidiaries	964	(12,547)	(1,329)
COMPREHENSIVE INCOME	93,904	84,267	73,035
Parent Company [Member]
Net income	92,940	96,814	74,364
OTHER COMPREHENSIVE INCOME
Equity in other comprehensive income (loss) income of subsidiaries	964	(12,547)	(1,329)
COMPREHENSIVE INCOME	$ 93,904	$ 84,267	$ 73,035

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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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