Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Receivables, allowance for doubtful accounts	$ 549	$ 519
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	20,000	20,000
Common stock, shares issued	10,363	10,346
Common stock, shares outstanding	10,363	10,346