Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Accounts receivable, net of allowance for doubtful accounts	$ 2,449	$ 627
Property and equipment, net of accumulated depreciation	62,334	59,702
Intangible assets, net of accumulated amortization	$ 12,983	$ 11,951
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	2,000	2,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	50,000	50,000
Common stock, shares issued	34,097	33,655
Common stock, shares outstanding	34,097	33,655
Treasury stock, shares	2,436	2,436