Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Document Period End Date	Sep. 30, 2014
Cash flows from operating activities:
Net income	$ 47,011	$ 44,029
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,442	7,459
Benefit for deferred taxes	(1,810)	(4,682)
Share based compensation	1,333	1,481
Provision for doubtful accounts	1,083	1,361
Debt discount amortization on convertible debt	26	32
Unrealized foreign exchange (gain) loss	(256)	(94)
(Gain) loss on put option	(296)	1,250
Reduction of acquisition earnout accruals	(7,533)	(10,253)
Changes in assets and liabilities, net of effects from acquisitions:
Accounts receivable	(1,901)	(4,562)
Other assets	(3,977)	845
Accounts payable and accrued expenses	(8,064)	(2,568)
Accrued payroll and related benefits	1,027	(1,205)
Deferred revenue	(704)	(2,802)
Deferred rent	(272)	(60)
Unrecognized tax benefits, period increase (decrease)	9,337	3,405
Loss Contingency Accrual, Period Increase (Decrease)	(3,868)	4,226
Other current liabilities	(188)	(86)
Net cash provided by operating activities	38,390	37,776
Cash flows from investing activities:
Maturities of marketable securities	0	104
Purchases of marketable securities	(595)	0
Capital expenditures	(15,922)	(887)
Net cash used in investing activities	(24,620)	(8,500)
Cash flows from financing activities:
Proceeds from / (Repayments) of Lines of Credit	40,625	(15,000)
Principal payments of term loan obligation	(31,938)	(6,531)
Repurchases of common stock	(16,482)	(2,492)
Excess tax benefit from share-based compensation	(3,200)	0
Proceeds from the exercise of stock options	788	1,425
Forfeiture of certain shares to satisfy exercise costs and the recipients income tax obligations related to stock options exercised and restricted stock vested	(37)	(916)
Dividend payments	(8,652)	(2,794)
Cash consideration for shares reacquired in connection with put option	(3,535)	0
Principal payments of debt obligations	(336)	(636)
Payments of capital lease obligations	(144)	(221)
Net cash used in financing activities	(22,911)	(27,165)
Effect of foreign exchange rates on cash	(183)	(1,671)
Net change in cash and cash equivalents	(9,324)	440
Cash and cash equivalents at the beginning of the period	56,674	36,449
Cash and cash equivalents at the end of the period	47,350	36,889
Supplemental disclosures of cash flow information:
Interest paid	802	901
Income taxes paid	10,782	13,009
Qatarlyst [Member]
Cash flows from investing activities:
Acquisition of business, net of cash acquired	0	(4,740)
Healthcare Magic [Member]
Cash flows from investing activities:
Acquisition of business, net of cash acquired	(5,856)	0
Curepet, Inc. [Member]
Cash flows from investing activities:
Acquisition of business, net of cash acquired	3	0
USIX [Member]
Cash flows from investing activities:
Payments for (Proceeds from) Previous Acquisition	0	(727)
Taimma [Member]
Cash flows from investing activities:
Payments for (Proceeds from) Previous Acquisition	$ (2,250)	$ (2,250)