Note 24 - Parent Company Only Financial Information - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
OPERATING ACTIVITIES:
Net income	$ 17,459	$ 10,574	$ 24,306
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred tax benefit	6,219	4,251	(20,570)
Deferred tax valuation allowance	(897)	(120)	(21,856)
Depreciation	3,706	3,293	2,171
Stock compensation expense	984	539	468
Changes in operating assets and liabilities:
Net cash provided by operating activities	24,452	13,741	5,526
INVESTING ACTIVITIES:
Purchases of office properties and equipment	(2,069)	(4,652)	(3,820)
Cash paid for acquisition, net of cash received	0	(13,931)	(8,985)
Net cash provided by (used in) investing activities	(114,503)	(37,691)	3,847
FINANCING ACTIVITIES:
Proceeds from other borrowings	4,800	1,850	18,163
Repayments of other borrowings	(1,650)	(1,151)	(5,250)
Proceeds from private placement	0	0	20,000
Proceeds from exercise of warrants	0	0	3,590
Proceeds from exercise of stock options	141	37	24
Repurchase of common stock	(3,672)	(256)	(5)
Dividends distributed	(2,820)	0	0
Payment for fractional shares, stock dividend	0	0	(7)
Net cash provided by (used in) financing activities	116,709	(37,005)	79,743
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	26,658	(60,955)	89,116
CASH AND CASH EQUIVALENTS:
Beginning of period	52,131	113,086	23,970
End of period	78,789	52,131	113,086
Parent Company [Member]
OPERATING ACTIVITIES:
Net income	17,459	10,574	24,306
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed net income of Bank	(14,265)	(699)	(1,630)
Deferred tax benefit	(164)	(1,174)	(1,414)
Deferred tax valuation allowance			(913)
Depreciation	95	118	71
Stock compensation expense	639	539	126
Changes in operating assets and liabilities:
Other assets	(543)	247	(2,872)
Accrued expenses and other liabilities	45	87	2,005
Net cash provided by operating activities	3,266	9,692	19,679
INVESTING ACTIVITIES:
Purchases of office properties and equipment	(8)	(48)	(942)
Cash paid for acquisition, net of cash received		(10,100)	(50,000)
Investment in Bank			(11,001)
Net cash provided by (used in) investing activities	(8)	(10,148)	(61,943)
FINANCING ACTIVITIES:
Proceeds from other borrowings	4,800	1,850	18,163
Repayments of other borrowings	(1,650)	(1,151)
Proceeds from private placement			20,000
Proceeds from exercise of warrants			3,590
Proceeds from exercise of stock options	141	37	24
Repurchase of common stock	(3,672)	(256)	(5)
Dividends distributed	(2,820)
Payment for fractional shares, stock dividend			(7)
Net cash provided by (used in) financing activities	(3,201)	480	41,765
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	57	24	(499)
CASH AND CASH EQUIVALENTS:
Beginning of period	118	94	593
End of period	$ 175	$ 118	$ 94