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Bank Call Loans - Summary of Bank Call Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Debt Disclosure [Abstract] |  |
Year-end balance | $ 100,200 | $ 59,400
Short-term Debt, Weighted Average Interest Rate | 1.56% | 1.22%
Maximum balance (at any month-end) | $ 189,000 | $ 197,000
Average amount outstanding (during the year) | $ 116,267 | $ 108,235
Average interest rate (during the year) | 1.28% | 1.26%

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- Definition Bank loans maximum balance at any month end. + References No definition available. + Details
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- Definition Weighted average interest rate of short-term debt outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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