CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowances (in dollars)	$ 5,613	$ 4,533
Other accounts receivable, allowances (in dollars)	$ 1,676	$ 1,422
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	27,697,264	27,507,241
Treasury stock, at cost, shares	1,677,932	1,677,932