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Segment Information (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 USD ($) segment | Mar. 31, 2016 USD ($)
Segment Reporting [Abstract] |  |
Number of reportable segments | segment | 2 |
Segment Reporting Information [Line Items] |  |
Operating revenues | $ 253,001 | $ 228,024
Operating expenses | 191,625 | 173,538
Operating income | 61,376 | 54,486
Account Services Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Operating revenues | 167,693 | 145,140
Operating expenses | 126,677 | 119,152
Operating income | 41,016 | 25,988
Processing and Settlement Services Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Operating revenues | 93,710 | 91,370
Operating expenses | 45,103 | 39,022
Operating income | 48,607 | 52,348
Corporate, Non-Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Operating revenues | (8,402) | (8,486)
Operating expenses | 19,845 | 15,364
Operating income | $ (28,247) | $ (23,850)

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