CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 47,330	$ 84,520
Short-term investments		314
Accounts receivable (less allowances of $2,786 in 2013 and $2,499 in 2012)	90,180	97,583
Deferred income taxes	864	864
Other current assets (includes restricted cash of $1,932 in 2013 and $1,917 in 2012)	21,207	21,997
Total current assets	159,581	205,278
Property and equipment, net	65,413	66,169
Goodwill	368,755	369,137
Intangible assets, net	172,397	180,156
Deferred income taxes	171	171
Other non-current assets (includes restricted cash of $4,005 in 2013 and $4,178 in 2012)	17,223	16,300
Total assets	783,540	837,211
CURRENT LIABILITIES:
Current portion of long-term debt	35,650	76,950
Accounts payable	6,497	7,794
Accrued liabilities	33,484	38,291
Deferred income taxes	37	37
Deferred revenue	1,916	1,627
Total current liabilities	77,584	124,699
Long-term debt, net of current portion	367,472	376,968
Deferred income taxes	29,669	28,028
Other non-current liabilities	17,121	16,322
Total liabilities	491,846	546,017
STOCKHOLDERS' EQUITY:
Preferred stock, $0.001 par value-Authorized 15,000 shares; issued and outstanding-none
Common stock, $0.001 par value-Authorized 200,000 shares; 29,173 issued and 27,669 outstanding at March 31, 2013; 29,163 issued and 27,659 outstanding at December 31, 2012	29	29
Treasury stock, at cost	(35,548)	(35,548)
Additional capital	650,826	647,515
Accumulated other comprehensive loss	(3,338)	(1,655)
Accumulated deficit	(320,275)	(319,147)
Total stockholders' equity	291,694	291,194
Total liabilities and stockholders' equity	$ 783,540	$ 837,211