CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
CONSOLIDATED BALANCE SHEETS
Accounts receivable - trade, allowance (in dollars)	$ 873	$ 1,021
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares issued	43,760,441	43,479,186
Common stock, shares outstanding	43,760,441	43,479,186