Loans (Interest Income Recognized in loans individually evaluated for impairment) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loan [Member]
Impaired Financing Receivable Interest Income Accrual Method [Abstract]
Total Interest Income	$ 5,271	$ 5,714	$ 5,583
Impaired Financing Receivable Average Recorded Investment [Abstract]
Total Average Recorded Investment	156,167	150,671	251,489
Originated Loans [Member]
Impaired Financing Receivable Interest Income Accrual Method [Abstract]
Total Interest Income	5,271	5,714	5,583
Impaired Financing Receivable Average Recorded Investment [Abstract]
Total Average Recorded Investment	155,420	149,877	250,562
Acquired loans accounted for under ASC 310-20 [Member]
Impaired Financing Receivable Interest Income Accrual Method [Abstract]
Total Interest Income	0	0
Impaired Financing Receivable Average Recorded Investment [Abstract]
Total Average Recorded Investment	0	0
Commercial Loan [Member] \| Originated Loans [Member]
Impaired Financing Receivable Interest Income Accrual Method [Abstract]
Impaired Financing Receivable With Related Allowance Interest Income Accrual Method	1,624	1,538	452
Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method	1,091	875	1,941
Impaired Financing Receivable Average Recorded Investment [Abstract]
Impaired Financing Receivable With Related Allowance Average Recorded Investment	44,727	25,797	118,980
Impaired Financing Receivable With No Related Allowance Average Recorded Investment	26,199	36,666	40,443
Commercial Loan [Member] \| Acquired loans accounted for under ASC 310-20 [Member]
Impaired Financing Receivable Interest Income Accrual Method [Abstract]
Impaired Financing Receivable With Related Allowance Interest Income Accrual Method	0	0	0
Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method	0	0	0
Impaired Financing Receivable Average Recorded Investment [Abstract]
Impaired Financing Receivable With Related Allowance Average Recorded Investment	747	794	319
Impaired Financing Receivable With No Related Allowance Average Recorded Investment	0	0	608
Troubled Debt Restructuring [Member] \| Originated Loans [Member]
Impaired Financing Receivable Interest Income Accrual Method [Abstract]
Impaired Financing Receivable With Related Allowance Interest Income Accrual Method	2,556	3,301	3,190
Impaired Financing Receivable Average Recorded Investment [Abstract]
Impaired Financing Receivable With Related Allowance Average Recorded Investment	$ 84,494	$ 87,414	$ 91,139

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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-Publisher FASB
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-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

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