Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Accounts receivable, net of allowances	$ 4,679	$ 4,209
Property and equipment, net of accumulated depreciation	$ 56,211	$ 47,629
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000	100,000
Common stock, shares issued	38,260	37,925
Common stock, shares outstanding	38,260	37,925