Note 6 - Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Intangible Assets and Goodwill [Table Text Block]

(In thousands)	2016			2015
Goodwill	$	348,505		$	327,686
Core deposit premiums:
Gross carrying amount		48,692			43,648
Accumulated amortization		(10,625	)		(6,217	)
Core deposit premiums, net		38,067			37,431
Purchased credit card relationships:
Gross carrying amount		2,068			2,068
Accumulated amortization		(1,344	)		(931	)
Purchased credit card relationships, net		724			1,137
Books of business intangible:
Gross carrying amount		15,884			15,293
Accumulated amortization		(1,716	)		(624	)
Books of business intangible, net		14,168			14,669
Other intangible assets, net		52,959			53,237
Total goodwill and other intangible assets	$	401,464		$	380,923

Core Deposit Premium [Member]

Notes Tables

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

(In thousands)	Year	Amortization Expense
	2017	$	6,202
	2018		6,099
	2019		5,789
	2020		5,777
	2021		5,715
	Thereafter		23,377
	Total	$	52,959