CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 32,248	$ 42,896
Restricted cash	3,120
Accounts receivable, less allowance for doubtful accounts of $22,022 and $22,028 in 2012 and 2011, respectively	133,308	138,826
Inventories	120,485	114,086
Prepaid expenses, other assets, and income taxes receivable	20,106	17,015
Deferred income taxes	20,652	20,648
Total current assets	329,919	333,471
PROPERTY, PLANT AND EQUIPMENT
Land	794	794
Buildings	7,294	4,400
Furniture and fixtures	17,464	17,281
Machinery and equipment	57,314	56,137
Equipment leased to third parties under operating leases	34,186	33,830
Leasehold improvements	66,410	65,245
Computer and software	84,216	81,775
Total property, plant and equipment, gross	267,678	259,462
Less accumulated depreciation	161,538	154,690
Total property, plant and equipment, net	106,140	104,772
INTANGIBLE ASSETS
Goodwill	611,147	609,484
Patents and other intangible assets, net	53,958	54,894
Total intangible assets, net	665,105	664,378
OTHER ASSETS
Debt issuance costs, net	16,622	17,485
Other assets	8,661	8,394
Total other assets	25,283	25,879
TOTAL ASSETS	1,126,447	1,128,500
CURRENT LIABILITIES
Current portion of long-term debt	7,927	8,065
Accounts payable	26,105	26,561
Accrued expenses	19,325	18,247
Accrued interest payable	6,615	3,040
Accrued compensation related costs	19,031	35,829
Total current liabilities	79,003	91,742
LONG-TERM LIABILITIES
Long-term debt, less current portion	498,168	499,968
Deferred income taxes	74,257	74,309
Other liabilities	35,183	32,818
Total liabilities	686,611	698,837
COMMITMENTS AND CONTINGENCIES (Note H)
SHAREHOLDERS' EQUITY
Common stock, $.01 par value; 60,000,000 shares authorized, 35,588,485 and 35,127,230 shares issued and outstanding at 2012 and 2011, respectively	356	351
Additional paid-in capital	271,149	268,535
Accumulated other comprehensive loss	(1,185)	(1,185)
Retained earnings	170,172	162,618
Total shareholders' equity excluding treasury stock	440,492	430,319
Treasury stock at cost (141,154 shares)	(656)	(656)
Total shareholders' equity	439,836	429,663
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 1,126,447	$ 1,128,500