Note 11 - Fair Value Measurement (Details Textual) - USD ($) |
3 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
Dec. 31, 2018 |
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| Asset Impairment Charges, Total | $ 1,900,000 | $ 2,300,000 | ||||
| Real Estate Owned, Amount of Loss at Acquisition | 22,000 | 254,000 | ||||
| SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Foreclosure | 340,000 | $ 360,000 | ||||
| Mortgage Loans in Process of Foreclosure, Amount | 0 | 173,000 | ||||
| Liabilities, Total | 7,565,250,000 | $ 7,292,179,000 | [1] | |||
| Fair Value, Recurring [Member] | ||||||
| Liabilities, Total | 0 | 0 | ||||
| Fair Value, Nonrecurring [Member] | ||||||
| Liabilities, Total | $ 0 | $ 0 | ||||
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| X | ||||||||||
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of decrease in investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from foreclosure. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of reduction to fair value of loan related to real estate owned (REO) at time of acquisition. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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