Borrowings - Schedule of Maturities of Other Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Long-term Debt, Fiscal Year Maturity [Abstract]
Balance at End of Year	$ 155,828	$ 127,522
Securities Sold under Agreements to Repurchase [Member]
Long-term Debt, Fiscal Year Maturity [Abstract]
2018	10,192
2019	10,266
2020	10,334
2021	0
2022	0
Thereafter	0
Balance at End of Year	$ 30,792	$ 31,274
Long-term Debt, Other Disclosures [Abstract]
2018 Weighted average interest rate	1.13%
2019 Weighted average interest rate	1.70%
2020 Weighted average interest rate	1.71%
2021 Weighted average interest rate	0.00%
2022 Weighted average interest rate	0.00%
Thereafter Weighted average interest rate	0.00%
Weighted average interest rate	1.52%	0.91%

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Weighted average interest rate of debt outstanding.

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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-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.

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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 next 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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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.

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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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The weighted average interest rate applicable to other long-term debt which are due after five years of Balance Sheet date.

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The weighted average interest rate applicable to other long-term debt which are due within four to five years of Balance Sheet date.

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The weighted average interest rate applicable to other long-term debt which are due within one year of the Balance Sheet date.

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The weighted average interest rate applicable to other long-term debt which are due within one to two years of the Balance Sheet date.

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The weighted average interest rate applicable to other long-term debt which are due within three to four years of the Balance Sheet date.

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The weighted average interest rate applicable to other long-term debt which are due within two to three years of the Balance Sheet date.

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