Consolidated Statements of Cash Flow (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income	$ 59,274	$ 70,569	$ 71,378
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	10,107	9,155	7,514
Provision for doubtful accounts	1,147	442	976
Provision for deferred taxes	(10,368)	(7,505)	(5,927)
Unrealized foreign exchange (gain)/losses on forward contracts	0	0	2,346
Unrealized foreign exchange (gain)/losses	(237)	443	(5,795)
Unrealized gain on put option	(341)	(191)	(537)
Share-based compensation	1,941	2,083	2,205
Debt discount amortization on convertible debt	42	39	21
Reduction of acquisition earn-out contingent liability	(10,253)	(699)	(2,847)
Changes in current assets and liabilities, net of acquisitions:
Accounts receivable	(3,347)	(2,023)	(2,903)
Other assets	80	(371)	1,647
Accounts payable and accrued expenses	1,135	730	1,525
Accrued payroll and related benefits	(1,866)	(594)	(532)
Deferred rent	(87)	(132)	(261)
Reserve for potential uncertain income tax return positions	6,817	2,745	200
Liability – securities litigation settlement	4,226	0	0
Other liabilities	(225)	(2,384)	836
Deferred revenue	(983)	(12)	796
Net cash provided by operating activities	57,062	72,295	70,642
Cash flows from investing activities:
Purchases of marketable securities	0	(785)	(3,098)
Maturities of marketable securities	107	1,466	7,600
Capital expenditures	(1,230)	(1,965)	(2,829)
Net cash used in investing activities	(8,840)	(63,375)	(13,320)
Cash flows from financing activities:
Proceeds from / (Repayment) to line of credit, net	(15,000)	6,090	6,750
Proceeds from term loan	0	45,000	16,250
Proceeds from the issuance of note payable	0	161	0
Principal payments on term loan obligation	(8,938)	(19,125)	(6,407)
Repurchase of common stock	(2,492)	(18,374)	(63,659)
Settlement on conversion of convertible debt	0	0	(6,761)
Payments of long term debt	(665)	(600)	0
Payments for capital lease obligations	(277)	(284)	(300)
Excess tax benefit from share-based compensation	3,237	1,044	644
Proceeds from exercise of common stock options	2,161	1,020	51
Forfeiture of certain shares to satisfy exercise costs and the recipients income tax obligations related to stock options exercised and restricted stock vested	(1,681)	(992)	0
Dividends paid	(2,794)	(7,034)	(1,461)
Net cash provided (used) by financing activities	(26,449)	6,906	(54,893)
Effect of foreign exchange rates on cash and cash equivalents	(1,548)	(3,073)	(2,130)
Net change in cash and cash equivalents	20,225	12,753	299
Cash and cash equivalents at the beginning of the year	36,449	23,696	23,397
Cash and cash equivalents at the end of the year	56,674	36,449	23,696
Supplemental disclosures of cash flow information:
Interest paid	1,169	1,350	710
Income taxes paid	13,779	8,590	3,796
BSI [Member]
Cash flows from investing activities:
Investments in acquired businesses, net of cash acquired	0	(992)	0
Taimma [Member]
Cash flows from investing activities:
Investments in acquired businesses, net of cash acquired	0	(5,003)	0
Payments of acquisition earn-out contingencies	(2,250)	0	0
Fintechnix [Member]
Cash flows from investing activities:
Investments in acquired businesses, net of cash acquired	0	(4,713)	0
Planetsoft [Member]
Adjustments to reconcile net income to cash provided by operating activities:
Unrealized gain on put option	(341)
Cash flows from investing activities:
Investments in acquired businesses, net of cash acquired	0	(35,078)	0
TriSystems [Member]
Cash flows from investing activities:
Investments in acquired businesses, net of cash acquired	0	(9,277)	0
Curepet, Inc. [Member]
Cash flows from investing activities:
Investment in Curepet, Inc.	0	(2,000)	0
ADAM
Cash flows from investing activities:
Investments in acquired businesses, net of cash acquired	0	0	3,529
MCN
Cash flows from investing activities:
Payments of acquisition earn-out contingencies	0	(1,537)	(381)
Qatarlyst [Member]
Cash flows from investing activities:
Investments in acquired businesses, net of cash acquired	(4,740)	0	0
USIX [Member]
Cash flows from investing activities:
Payments of acquisition earn-out contingencies	(727)	(1,466)	0
Health Connect Systems [Member]
Cash flows from investing activities:
Investments in acquired businesses, net of cash acquired	0	0	(17,945)
Payments of acquisition earn-out contingencies	0	(2,000)	0
ConfirmNet
Cash flows from investing activities:
Payments of acquisition earn-out contingencies	0	0	(184)
Facts [Member]
Cash flows from investing activities:
Payments of acquisition earn-out contingencies	$ 0	$ (25)	$ (12)