CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Interest rate swaps, tax	$ 342,000	$ 323,000	$ 1,345,000
Pension adjustment, tax	(467,000)	0	543,000
Capitalized swap interest, tax (benefit)	$ 8,000	$ 91,000	$ 109,000