Consolidated Statements of Equity (Unaudited) (Parentheticals) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Retained Earnings [Member]
Cash dividend declared, per share (in dollars per share)	$ 0.33	$ 0.25
Amortization of unrealized gains, tax	$ 18	$ 24
Loss in respect of derivative instruments designated for cash flow hedge, related tax	$ 24
Cash dividend declared, per share (in dollars per share)	$ 0.33	$ 0.25
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment, tax.	$ 0	$ 0

Aggregate dividends declared during the period for each share of common stock outstanding.

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