Note 24 - Parent Company Only Financial Information - Condensed Statements of Financial Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash and cash equivalents (deposits in subsidiary Bank)	$ 53,568	$ 78,789	$ 52,131	$ 113,086
Office properties and equipment, net	50,546	54,049
Deferred tax asset, net	4,611	11,619
TOTAL	2,160,963	2,053,175
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other borrowings	386,811	152,004
Stockholders’ equity	253,157	233,427	223,157	170,454
TOTAL	2,160,963	2,053,175
Parent Company [Member]
Cash and cash equivalents (deposits in subsidiary Bank)	1,976	175	$ 118	$ 94
Office properties and equipment, net	91	581
Deferred tax asset, net	770	1,552
Investment in Bank	262,752	250,211
Due from Bank	2,906	3,169
Other assets	285	289
TOTAL	268,780	255,977
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other borrowings	12,150	22,012
Accrued expenses and other liabilities	3,473	538
Stockholders’ equity	253,157	233,427
TOTAL	$ 268,780	$ 255,977