CONDENSED CONSOLIDATING FINANCIAL INFORMATION - BALANCE SHEETS (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 127,861	$ 119,051	$ 99,334	$ 102,030
Settlement receivables	42,443	128,821
Total trade and other receivables, current portion	47,874	56,651
Inventory	22,386	19,068
Prepaid expenses and other assets	21,555	18,048
Total current assets	262,119	341,639
Non-current assets
Property, equipment and leased assets, net	97,303	98,439
Goodwill	640,551	640,546
Other intangible assets, net	309,450	317,997
Other receivables	3,453	2,020
Other assets	7,598	7,522
Total non-current assets	1,058,355	1,066,524
Total assets	1,320,474	1,408,163
Current Liabilities
Settlement liabilities	127,635	239,123
Accounts payable and accrued expenses	120,348	94,391
Current portion of long-term debt	10,000	10,000
Total current liabilities	257,983	343,514
Non-current liabilities
Deferred tax liability	58,238	57,611
Long-term debt, less current portion	1,110,995	1,111,880
Other accrued expenses and liabilities	2,874	2,951
Total non-current liabilities	1,172,107	1,172,442
Total liabilities	1,430,090	1,515,956
Stockholders' deficit)
Common stock	91	91
Additional paid-in capital	266,175	264,755
Retained (deficit) earnings	(197,806)	(194,299)
Accumulated other comprehensive (loss) income	(1,838)	(2,109)
Treasury stock, at cost	(176,238)	(176,231)
Total stockholders' deficit	(109,616)	(107,793)
Total liabilities and stockholders' deficit	1,320,474	1,408,163
Reportable Legal Entities | Parent
Current assets
Cash and cash equivalents				6
Non-current assets
Investment in subsidiaries	(109,582)	(107,751)
Total non-current assets	(109,582)	(107,751)
Total assets	(109,582)	(107,751)
Stockholders' deficit)
Common stock	91	91
Additional paid-in capital	266,175	264,755
Retained (deficit) earnings	(197,806)	(194,299)
Accumulated other comprehensive (loss) income	(1,804)	(2,067)
Treasury stock, at cost	(176,238)	(176,231)
Total stockholders' deficit	(109,582)	(107,751)
Total liabilities and stockholders' deficit	(109,582)	(107,751)
Reportable Legal Entities | Subsidiary Issuer
Current assets
Cash and cash equivalents	101,319	88,648	75,422	87,078
Settlement receivables	38,271	122,222
Total trade and other receivables, current portion	7,971	9,001
Inventory	6,257	6,009
Prepaid expenses and other assets	5,800	5,359
Intercompany balances	112,547	106,729
Total current assets	272,165	337,968
Non-current assets
Property, equipment and leased assets, net	13,674	15,144
Goodwill	151,417	151,417
Other intangible assets, net	21,829	23,901
Other receivables	1,626	2,019
Investment in subsidiaries	176,399	171,979
Deferred tax asset, non-current	36,933	37,578
Other assets	5,097	4,940
Intercompany balances	1,144,846	1,143,115
Total non-current assets	1,551,821	1,550,093
Total assets	1,823,986	1,888,061
Current Liabilities
Settlement liabilities	120,415	225,170
Accounts payable and accrued expenses	85,324	64,192
Current portion of long-term debt	10,000	10,000
Intercompany balances	194,086	189,488
Total current liabilities	409,825	488,850
Non-current liabilities
Long-term debt, less current portion	1,110,995	1,111,880
Other accrued expenses and liabilities	2,524	2,583
Total non-current liabilities	1,113,519	1,114,463
Total liabilities	1,523,344	1,603,313
Stockholders' deficit)
Additional paid-in capital	86,498	85,499
Retained (deficit) earnings	215,948	201,316
Accumulated other comprehensive (loss) income	(1,804)	(2,067)
Total stockholders' deficit	300,642	284,748
Total liabilities and stockholders' deficit	1,823,986	1,888,061
Reportable Legal Entities | Guarantor Subsidiaries
Current assets
Cash and cash equivalents	8,597	9,103	7,429	3,900
Total trade and other receivables, current portion	37,198	41,743
Inventory	16,129	13,059
Prepaid expenses and other assets	5,023	3,807
Intercompany balances	196,137	188,028
Total current assets	263,084	255,740
Non-current assets
Property, equipment and leased assets, net	82,410	81,993
Goodwill	488,512	488,512
Other intangible assets, net	283,359	289,338
Other receivables	1,827
Investment in subsidiaries	990	1,293
Other assets	2,237	2,286
Intercompany balances		7,851
Total non-current assets	859,335	871,273
Total assets	1,122,419	1,127,013
Current Liabilities
Settlement liabilities	105	268
Accounts payable and accrued expenses	31,749	28,970
Intercompany balances	107,257	101,387
Total current liabilities	139,111	130,625
Non-current liabilities
Deferred tax liability	95,171	95,189
Other accrued expenses and liabilities	350	368
Intercompany balances	1,144,846	1,143,116
Total non-current liabilities	1,240,367	1,238,673
Total liabilities	1,379,478	1,369,298
Stockholders' deficit)
Additional paid-in capital	5,728	5,314
Retained (deficit) earnings	(262,186)	(247,273)
Accumulated other comprehensive (loss) income	(601)	(326)
Total stockholders' deficit	(257,059)	(242,285)
Total liabilities and stockholders' deficit	1,122,419	1,127,013
Reportable Legal Entities | Non-Guarantor Subsidiaries
Current assets
Cash and cash equivalents	17,945	21,300	$ 16,483	$ 11,046
Settlement receivables	4,172	6,599
Total trade and other receivables, current portion	2,705	5,907
Prepaid expenses and other assets	10,732	8,882
Intercompany balances	1,452	1,461
Total current assets	37,006	44,149
Non-current assets
Property, equipment and leased assets, net	1,219	1,302
Goodwill	622	617
Other intangible assets, net	4,262	4,758
Other receivables		1
Investment in subsidiaries	86	86
Other assets	264	296
Total non-current assets	6,453	7,060
Total assets	43,459	51,209
Current Liabilities
Settlement liabilities	7,115	13,685
Accounts payable and accrued expenses	3,275	1,229
Intercompany balances	8,793	5,343
Total current liabilities	19,183	20,257
Non-current liabilities
Intercompany balances		7,850
Total non-current liabilities		7,850
Total liabilities	19,183	28,107
Stockholders' deficit)
Additional paid-in capital	21,103	21,093
Retained (deficit) earnings	5,832	5,168
Accumulated other comprehensive (loss) income	(2,659)	(3,159)
Total stockholders' deficit	24,276	23,102
Total liabilities and stockholders' deficit	43,459	51,209
Eliminations
Current assets
Intercompany balances	(310,136)	(296,218)
Total current assets	(310,136)	(296,218)
Non-current assets
Investment in subsidiaries	(67,893)	(65,607)
Deferred tax asset, non-current	(36,933)	(37,578)
Intercompany balances	(1,144,846)	(1,150,966)
Total non-current assets	(1,249,672)	(1,254,151)
Total assets	(1,559,808)	(1,550,369)
Current Liabilities
Intercompany balances	(310,136)	(296,218)
Total current liabilities	(310,136)	(296,218)
Non-current liabilities
Deferred tax liability	(36,933)	(37,578)
Intercompany balances	(1,144,846)	(1,150,966)
Total non-current liabilities	(1,181,779)	(1,188,544)
Total liabilities	(1,491,915)	(1,484,762)
Stockholders' deficit)
Additional paid-in capital	(113,329)	(111,906)
Retained (deficit) earnings	40,406	40,789
Accumulated other comprehensive (loss) income	5,030	5,510
Total stockholders' deficit	(67,893)	(65,607)
Total liabilities and stockholders' deficit	$ (1,559,808)	$ (1,550,369)