Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Accounts receivable, net of allowances	$ 14,154	$ 14,026
Property and equipment, net of accumulated depreciation	$ 71,528	$ 64,780
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	38,318,000	38,266,000
Common stock, shares outstanding (in shares)	38,318,000	38,266,000