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Note 5 - Loans - Components of Loans in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Loans	$ 12,870,290	$ 11,201,275
Less: Allowance for loan losses	(123,279)	(118,966)
Unamortized deferred loan fees, net	(3,245)	(4,994)
Total loans and leases, net	12,743,766	11,077,315
Loans held for sale	8,000	7,500
Commercial Portfolio Segment [Member]
Loans	2,461,266	2,248,187
Less: Allowance for loan losses	(49,796)	(49,203)
Real Estate Construction Portfolio Segment [Member]
Loans	678,805	548,088
Less: Allowance for loan losses	(24,838)	(23,268)
Commercial Real Estate Portfolio Segment [Member]
Loans	6,482,695	5,785,248
Less: Allowance for loan losses	(37,610)	(34,864)
Residential Portfolio Segment [Member]
Loans	3,062,050	2,444,048
Equity Lines Portfolio Segment [Member]
Loans	180,304	171,711
Consumer Portfolio Segment [Member]
Loans	5,170	3,993
Less: Allowance for loan losses	$ (22)	$ (11)

X

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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- Definition

Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Amount, after allowance for bad debt, of loan receivables held-for-sale that are not part of a disposal group. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities.

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