Consolidated Statements of Equity (Unaudited) (Parentheticals) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Retained Earnings [Member]
Cash dividend declared, per share (in dollars per share)	$ 0.31	$ 0.08
Cash flow hedge, tax	$ 12,000	$ 14,000
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	$ 14,000	$ 19,000
Cash dividend declared, per share (in dollars per share)	$ 0.31	$ 0.08