CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
CURRENT ASSETS:
Customer receivables, allowance for doubtful accounts	$ 365	$ 431
OTHER ASSETS:
Deferred financing costs, accumulated amortization	$ 4,006	$ 3,649
STOCKHOLDERS' EQUITY:
Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized (in shares)	10,000,000	10,000,000
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (in shares)	80,000,000	80,000,000
Common Stock, shares issued (in shares)	47,702,504	47,515,155
Common Stock, shares outstanding (in shares)	47,702,504	47,515,155