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Supplemental Guarantors Consolidating Condensed Financial Information (Statement of Cash Flows) (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Cash flows from operating activities:    
Net cash provided by (used in) operating activities $ 44,281 $ 29,131
Cash flows from investing activities:    
Cash invested in seismic data (20,518) (20,699)
Cash paid to acquire property and equipment (362) (176)
Cash from sale of property and equipment 3 18
Advances to Seitel Holdings, Inc. (11) (19)
Net cash used in investing activities (20,888) (20,876)
Cash flows from financing activities:    
Principal payments on capital lease obligations (178) (152)
Intercompany transfers 0 0
Net cash used in financing activities (178) (152)
Effect of exchange rate changes 1,061 96
Net increase in cash and cash equivalents 24,276 8,199
Cash and cash equivalents at beginning of period 55,997 52,675
Cash and cash equivalents at end of period 80,273 60,874
Consolidation, Eliminations [Member]    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities 0 0
Cash flows from investing activities:    
Cash invested in seismic data 0 0
Cash paid to acquire property and equipment 0 0
Cash from sale of property and equipment 0 0
Advances to Seitel Holdings, Inc. 0 0
Net cash used in investing activities 0 0
Cash flows from financing activities:    
Principal payments on capital lease obligations 0 0
Intercompany transfers 0 0
Net cash used in financing activities 0 0
Effect of exchange rate changes 0 0
Net increase in cash and cash equivalents 0 0
Cash and cash equivalents at beginning of period 0 0
Cash and cash equivalents at end of period 0 0
Parent [Member]    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities (12,325) (12,525)
Cash flows from investing activities:    
Cash invested in seismic data 0 0
Cash paid to acquire property and equipment 0 0
Cash from sale of property and equipment 0 0
Advances to Seitel Holdings, Inc. 0 0
Net cash used in investing activities 0 0
Cash flows from financing activities:    
Principal payments on capital lease obligations 0 0
Intercompany transfers 12,325 12,525
Net cash used in financing activities 12,325 12,525
Effect of exchange rate changes 0 0
Net increase in cash and cash equivalents 0 0
Cash and cash equivalents at beginning of period 0 0
Cash and cash equivalents at end of period 0 0
Guarantor Subsidiaries [Member]    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities 32,878 35,409
Cash flows from investing activities:    
Cash invested in seismic data (13,081) (19,141)
Cash paid to acquire property and equipment (260) (173)
Cash from sale of property and equipment 0 17
Advances to Seitel Holdings, Inc. (11) (19)
Net cash used in investing activities (13,352) (19,316)
Cash flows from financing activities:    
Principal payments on capital lease obligations 0 0
Intercompany transfers (12,325) (12,326)
Net cash used in financing activities (12,325) (12,326)
Effect of exchange rate changes 0 0
Net increase in cash and cash equivalents 7,201 3,767
Cash and cash equivalents at beginning of period 47,971 51,192
Cash and cash equivalents at end of period 55,172 54,959
Non-Guarantor Subsidiaries [Member]    
Cash flows from operating activities:    
Net cash provided by (used in) operating activities 23,728 6,247
Cash flows from investing activities:    
Cash invested in seismic data (7,437) (1,558)
Cash paid to acquire property and equipment (102) (3)
Cash from sale of property and equipment 3 1
Advances to Seitel Holdings, Inc. 0 0
Net cash used in investing activities (7,536) (1,560)
Cash flows from financing activities:    
Principal payments on capital lease obligations (178) (152)
Intercompany transfers 0 (199)
Net cash used in financing activities (178) (351)
Effect of exchange rate changes 1,061 96
Net increase in cash and cash equivalents 17,075 4,432
Cash and cash equivalents at beginning of period 8,026 1,483
Cash and cash equivalents at end of period $ 25,101 $ 5,915