Long-Term Borrowings (Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Nine months ending December 31, 2018	$ 3,840
Year ending December 31, 2019	13,508
Year ending December 31, 2020	25,564
Year ending December 31, 2021	21,979
Year ending December 31, 2022	16,521
Thereafter	42,069
Long-term borrowings	$ 123,481	$ 144,019
Nine months ending December 31, 2016	1.58%
Year ending December 31, 2017	1.21%
Year ending December 31, 2018	1.83%
Year ending December 31, 2019	1.74%
Year ending December 31, 2020	1.96%
Thereafter	3.26%
Total long-term borrowings	2.24%	2.11%

Long-term Debt, Maturities, Repayments of Principal after Year Five, Weighted Average Interest Rate

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Long-term Debt, Maturities, Repayments of Principal in Year Five, Weighted Average Interest Rate

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Long-term Debt, Maturities, Repayments of Principal in Year Four, Weighted Average Interest Rate

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- Definition

Long-term Debt, Maturities, Repayments of Principal in Year Three, Weighted Average Interest Rate

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No definition available.

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- Definition

Long-term Debt, Maturities, Repayments of Principal in Year Two, Weighted Average Interest Rate

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No definition available.

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- Definition

Long-term Debt, Maturities, Repayments of Principal Remainder of Fiscal Year, Weighted Average Interest Rate

+ References

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
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-Name Accounting Standards Codification
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-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04.(a))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 3
-Subparagraph (SX 210.12-04.(a))
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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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