Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash	$ 109,577	$ 84,470
Accounts receivable, net of allowance for doubtful accounts of $2,241 and $2,500, respectively	94,359	91,221
Prepaid expenses and other current assets	14,927	16,567
Prepaid income taxes	11,857	19,932
Deferred income taxes	2,975	6,526
Restricted cash	1,477	2,460
Total current assets	235,172	221,176
Property, plant and equipment:
Land	2,655	2,655
Building and improvements	28,521	30,053
Equipment, furniture, and fixtures	79,564	65,977
Total property and equipment	110,740	98,685
Less: accumulated depreciation	(56,463)	(46,988)
Net property, plant and equipment	54,277	51,697
Deferred income taxes	1,135	1,077
Goodwill	1,573,227	1,541,386
Intangible and other assets, net of accumulated amortization of $416,708 and $338,888, respectively	421,511	459,988
Total assets	2,285,322	2,275,324
Current liabilities:
Current portion of long-term debt (Note 6)	20,470	23,212
Accounts payable	12,004	8,368
Income taxes payable	1,116	2,169
Accrued employee compensation and benefits	53,975	44,664
Deferred taxes	110
Other accrued expenses	30,666	26,028
Deferred maintenance and other revenue	73,254	62,561
Total current liabilities	191,595	167,002
Long-term debt, net of current portion (Note 6)	618,435	751,295
Other long-term liabilities	26,446	14,913
Deferred income taxes	102,176	110,406
Total liabilities	938,652	1,043,616
Commitments and contingencies (Note 13)
Common stock:
Common stock	822	804
Additional paid-in capital	964,845	913,816
Accumulated other comprehensive income	(15,121)	30,374
Retained earnings	414,082	293,449
Total common stock	1,364,655	1,238,470
Less: cost of common stock in treasury, 786 and 511 shares, respectively	(17,985)	(6,762)
Total stockholders' equity	1,346,670	1,231,708
Total liabilities and stockholders' equity	2,285,322	2,275,324
Class A Non-Voting Common Stock [Member]
Common stock:
Common stock	27	27
Total stockholders' equity	$ 27	$ 27