CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowances (in dollars)	$ 5,311	$ 5,731
Other accounts receivable, allowances (in dollars)	$ 979	$ 1,701
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	70,000,000	70,000,000
Common stock, issued shares	27,932,109	27,722,010
Treasury stock, at cost, shares	1,970,118	1,677,932