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Available-for-sale securities (Details) $ in Thousands | 6 Months Ended
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Jun. 30, 2016 USD ($)
Schedule of Available-for-sale Securities [Line Items] |
Available-for-sale Securities, Amortized Cost Basis | $ 7,996
Available-for-sale Securities | 7,990
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax | 8
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax | (14)
Available-for-sale Securities, Equity & Debt Maturities, Next Rolling Twelve Months, Fair Value | 1,004
Available-for-sale Securities, Equity & Debt Maturities, Rolling Year One Through Three, Fair Value | 4,881
Available-for-sale Securities, Equity & Debt Maturities, Rolling After Year Three, Fair Value | 2,105
Equity Securities [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Available-for-sale Securities, Equity Maturities, Next Rolling Twelve Months, Fair Value | 0
Available-for-sale Securities, Amortized Cost Basis | 250
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax | 8
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax | 0
Available-for-sale Securities | 258
Available-for-sale Securities, Equity Maturities, Rolling Year One Through Three, Fair Value | 0
Available-for-sale Securities, Equity Maturities, Rolling After Year Three, Fair Value | 258
Corporate Debt Securities [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Available-for-sale Securities, Amortized Cost Basis | 7,746
Available-for-sale Securities | 7,732
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (14)
Available-for-sale Securities, Debt Maturities, Next Rolling Twelve Months, Fair Value | 1,004
Available-for-sale Securities, Debt Maturities, Rolling Year One Through Three, Fair Value | 4,881
Available-for-sale Securities, Debt Maturities, Rolling After Year Three, Fair Value | 1,847
Available-for-sale Securities [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax | $ 0

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