CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Assets:
Fixed assets, accumulated depreciation	$ 19,404	$ 19,215
Intangible assets, accumulated amortization	$ 3,281	$ 3,122
Shareholders' equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	11,215,894	11,185,331
Common stock, shares outstanding (in shares)	7,363,927	7,333,364
Treasury stock (in shares)	3,851,967	3,851,967