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Note 8 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Computed at the statutory rate (35%)	$ 50,203	$ 37,543	$ 17,601
State income taxes, net of federal tax benefit	2,121	2,097	41
Tax exempt interest income	(4,207)	(4,708)	(3,774)
Tax exempt earnings on BOLI	(905)	(724)	(499)
Section 382 adjustment		(2,293)
Other differences, net	(588)	985	1,233
Provision for income taxes	$ 46,624	$ 32,900	$ 14,602

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- Definition

Adjustment to the effective income tax rate from limitations on operating loss carry-forwards pursuant to section 382 as defined by regulation.

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Income tax rate reconciliation on tax exempt interest income.

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- Definition

Income tax rate reconciliation on cash value changes in bank owned life insurance.

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a),(b)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit).

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