Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income (loss)	$ 20,397	$ 38,088	$ (37,917)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	64,167	60,457	57,496
Share-based compensation	11,823	10,756	9,294
Unrealized foreign exchange loss, net	99	1,662	7,850
Non-cash impairment of goodwill and acquired intangible assets	28,740	0	70,925
Other gains	(4,388)	0	(3,110)
Deferred income taxes	(6,484)	(251)	(4,079)
Income from unconsolidated affiliates	(942)	(1,852)	(1,461)
Accretion of convertible debentures discount and amortization of debt issuance costs	7,672	11,952	8,833
Loss on early retirement of debt	0	1,899	0
Changes in working capital, net of amounts acquired:
Income taxes payable, net	4,215	(7,969)	(5,621)
Restricted cash	(5,251)	34,147	(28,591)
Inventory - PINs and other	(1,980)	5,482	764
Trade accounts receivable	(12,149)	(62,103)	8,024
Prepaid expenses and other current assets	(2,846)	(20,559)	(16,518)
Trade accounts payable	103,279	31,926	68,611
Deferred revenue	5,177	(350)	(2,766)
Accrued expenses and other current liabilities	(37,671)	1,753	(19,216)
Changes in noncurrent assets and liabilities	7,596	(5,732)	(4,432)
Net cash provided by operating activities	181,454	99,306	108,086
Cash flows from investing activities:
Acquisitions, net of cash acquired	(22,337)	(78,688)	(24,418)
Purchases of property and equipment	(46,212)	(46,002)	(29,199)
Purchases of other long-term assets	(4,439)	(3,183)	(4,055)
Other, net	3,825	3,809	2,300
Net cash used in investing activities	(69,163)	(124,064)	(55,372)
Cash flows from financing activities:
Proceeds from issuance of shares	2,884	2,397	2,116
Repurchase of shares	(42,853)	(15,996)	0
Borrowings from revolving credit agreements	1,016,852	529,305	144,800
Repayments of revolving credit agreements	(888,733)	(442,111)	(183,972)
Proceeds from long-term debt obligations	0	80,000	0
Repayments of long-term debt obligations	(172,352)	(128,000)	(3,227)
Repayments of capital lease obligations	(2,880)	(2,578)	(2,843)
Payment of acquisition contingent consideration	0	(5,455)	0
Debt issuance costs	(1,888)	(3,514)	0
Purchase of subsidiary shares from noncontrolling interests	(3,321)	0	0
Cash dividends paid to noncontrolling interests stockholders'	(472)	(1,055)	(2,224)
Other, net	187	924	576
Net cash (used in) provided by financing activities	(92,576)	13,917	(44,774)
Effect of exchange rate changes on cash and cash equivalents	809	(5,731)	(4,233)
Increase (decrease) in cash and cash equivalents	20,524	(16,572)	3,707
Cash and cash equivalents at beginning of period	170,663	187,235	183,528
Cash and cash equivalents at end of period	191,187	170,663	187,235
Interest paid during the period	12,502	11,883	11,594
Income taxes paid during the period	$ 27,275	$ 32,944	$ 28,482