Note 3 - Goodwill and Other Intangible Assets - Goodwill and Intangible Assets Related to Acquisitions (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Goodwill |
$ 104,765
|
$ 35,781
|
|
| Goodwill additions/adjustments |
|
68,984
|
|
| Goodwill amortization |
0
|
0
|
|
| Goodwill |
104,765
|
104,765
|
$ 35,781
|
| Intangible assets |
23,903
|
22,521
|
|
| Intangible assets additions/adjustments |
|
5,596
|
|
| Intangible asset amortization |
(3,498)
|
(4,214)
|
(2,659)
|
| Intangible assets |
20,405
|
23,903
|
22,521
|
| Intangible asset amortization |
(3,498)
|
(4,214)
|
|
| Grand total |
128,668
|
58,302
|
|
| Grand total |
|
74,580
|
|
| Grand total |
125,170
|
128,668
|
58,302
|
| Core Deposits [Member] |
|
|
|
| Intangible assets |
4,272
|
1,066
|
|
| Intangible assets additions/adjustments |
|
4,191
|
|
| Intangible asset amortization |
(825)
|
(985)
|
|
| Intangible assets |
$ 3,447
|
$ 4,272
|
1,066
|
| Intangible asset amortization period (Year) |
10 years
|
10 years
|
|
| Customer Relationships [Member] |
|
|
|
| Intangible assets |
$ 14,384
|
$ 15,562
|
|
| Intangible assets additions/adjustments |
|
424
|
|
| Intangible asset amortization |
(1,328)
|
(1,602)
|
|
| Intangible assets |
$ 13,056
|
$ 14,384
|
15,562
|
| Customer Relationships [Member] | Minimum [Member] |
|
|
|
| Intangible asset amortization period (Year) |
10 years
|
10 years
|
|
| Customer Relationships [Member] | Maximum [Member] |
|
|
|
| Intangible asset amortization period (Year) |
20 years
|
20 years
|
|
| Noncompete Agreements [Member] |
|
|
|
| Intangible assets |
$ 2,932
|
$ 3,728
|
|
| Intangible assets additions/adjustments |
|
257
|
|
| Intangible asset amortization |
(1,298)
|
(1,053)
|
|
| Intangible assets |
$ 1,634
|
$ 2,932
|
3,728
|
| Noncompete Agreements [Member] | Minimum [Member] |
|
|
|
| Intangible asset amortization period (Year) |
5 years
|
5 years
|
|
| Noncompete Agreements [Member] | Maximum [Member] |
|
|
|
| Intangible asset amortization period (Year) |
10 years
|
10 years
|
|
| Trade Names [Member] |
|
|
|
| Intangible assets |
$ 2,165
|
$ 2,165
|
|
| Intangible assets additions/adjustments |
|
|
|
| Intangible asset amortization |
|
|
|
| Intangible assets |
2,165
|
2,165
|
2,165
|
| Off-Market Favorable Lease [Member] |
|
|
|
| Intangible assets |
150
|
|
|
| Intangible assets additions/adjustments |
|
724
|
|
| Intangible asset amortization |
(47)
|
(574)
|
|
| Intangible assets |
$ 103
|
$ 150
|
|
| Off-Market Favorable Lease [Member] | Minimum [Member] |
|
|
|
| Intangible asset amortization period (Year) |
1 year 150 days
|
1 year 150 days
|
|
| Off-Market Favorable Lease [Member] | Maximum [Member] |
|
|
|
| Intangible asset amortization period (Year) |
6 years 90 days
|
6 years 90 days
|
|
| Wealth [Member] |
|
|
|
| Goodwill |
$ 20,412
|
$ 20,412
|
|
| Goodwill additions/adjustments |
|
|
|
| Goodwill amortization |
|
|
|
| Goodwill |
20,412
|
20,412
|
20,412
|
| Banking [Member] |
|
|
|
| Goodwill |
80,783
|
12,431
|
|
| Goodwill additions/adjustments |
|
68,352
|
|
| Goodwill amortization |
|
|
|
| Goodwill |
80,783
|
80,783
|
12,431
|
| Insurance [Member] |
|
|
|
| Goodwill |
3,570
|
2,938
|
|
| Goodwill additions/adjustments |
|
632
|
|
| Goodwill amortization |
|
|
|
| Goodwill |
$ 3,570
|
$ 3,570
|
$ 2,938
|