Consolidated Statements of Equity (Unaudited) (Parentheticals) - USD ($)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Retained Earnings [Member]
Cash dividend declared, per share (in dollars per share)	$ 0.38	$ 0.14
Cash flow hedge, tax	$ 25,000	$ 27,000
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment, tax	0	0
Amortization of unrealized gains in respect of derivative instruments designated for cash flow hedge, related tax	$ 30,000	$ 38,000
Cash dividend declared, per share (in dollars per share)	$ 0.38	$ 0.12