CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Comprehensive Income (Loss), Tax	$ (17,519)	$ 20,264	$ (18,447)
Cash dividends declared, Common, per share	$ 0.666	$ 0.82	$ 0.82
Stock options exercised, net, shares	0	0	20,000
Stock Issued During Period, Shares, Restricted Stock Award Net of Forfeitures and Tax Obligations Settled in Shares	31,147	130,925	74,297
Treasury shares repurchased, shares	0	0
Treasury Stock [Member]
Treasury shares repurchased, shares	596,632	150,000	0