Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000092521-15-000003-index-headers.html | 2015-02-23 17:20:44 | |
| 0000092521-15-000003-index.html | 2015-02-23 17:20:44 | |
| 0000092521-15-000003.txt | 2015-02-23 17:20:44 | |
 0000092521-15-000003-xbrl.zip | 446302 | 2015-02-23 17:20:44 |
| FilingSummary.xml | 51895 | 2015-02-23 17:20:44 |
| Financial_Report.xls | 3740195 | 2015-02-23 17:20:44 |
| Financial_Report.xlsx | 421225 | 2015-02-23 17:20:44 |
| R1.htm | 38205 | 2015-02-23 17:20:44 |
| R10.htm | 60220 | 2015-02-23 17:20:44 |
| R11.htm | 33881 | 2015-02-23 17:20:44 |
| R12.htm | 46177 | 2015-02-23 17:20:44 |
| R13.htm | 10611 | 2015-02-23 17:20:44 |
| R14.htm | 39082 | 2015-02-23 17:20:44 |
| R15.htm | 87106 | 2015-02-23 17:20:44 |
| R16.htm | 10147 | 2015-02-23 17:20:44 |
| R17.htm | 162278 | 2015-02-23 17:20:44 |
| R18.htm | 622555 | 2015-02-23 17:20:44 |
| R19.htm | 21148 | 2015-02-23 17:20:44 |
| R2.htm | 156900 | 2015-02-23 17:20:44 |
| R20.htm | 249061 | 2015-02-23 17:20:44 |
| R21.htm | 54764 | 2015-02-23 17:20:44 |
| R22.htm | 171207 | 2015-02-23 17:20:44 |
| R23.htm | 110991 | 2015-02-23 17:20:44 |
| R24.htm | 36905 | 2015-02-23 17:20:44 |
| R25.htm | 52427 | 2015-02-23 17:20:44 |
| R26.htm | 37091 | 2015-02-23 17:20:44 |
| R27.htm | 31934 | 2015-02-23 17:20:44 |
| R28.htm | 123661 | 2015-02-23 17:20:44 |
| R29.htm | 45523 | 2015-02-23 17:20:44 |
| R3.htm | 50263 | 2015-02-23 17:20:44 |
| R30.htm | 74631 | 2015-02-23 17:20:44 |
| R31.htm | 15036 | 2015-02-23 17:20:44 |
| R32.htm | 160174 | 2015-02-23 17:20:44 |
| R33.htm | 617903 | 2015-02-23 17:20:44 |
| R34.htm | 20370 | 2015-02-23 17:20:44 |
| R35.htm | 239376 | 2015-02-23 17:20:44 |
| R36.htm | 27097 | 2015-02-23 17:20:44 |
| R37.htm | 131773 | 2015-02-23 17:20:44 |
| R38.htm | 112131 | 2015-02-23 17:20:44 |
| R39.htm | 36423 | 2015-02-23 17:20:44 |
| R4.htm | 67684 | 2015-02-23 17:20:44 |
| R40.htm | 48734 | 2015-02-23 17:20:44 |
| R41.htm | 35738 | 2015-02-23 17:20:44 |
| R42.htm | 15945 | 2015-02-23 17:20:44 |
| R43.htm | 13910 | 2015-02-23 17:20:44 |
| R44.htm | 13091 | 2015-02-23 17:20:44 |
| R45.htm | 21628 | 2015-02-23 17:20:44 |
| R46.htm | 46238 | 2015-02-23 17:20:44 |
| R47.htm | 15522 | 2015-02-23 17:20:44 |
| R48.htm | 67826 | 2015-02-23 17:20:44 |
| R49.htm | 59515 | 2015-02-23 17:20:44 |
| R5.htm | 6870 | 2015-02-23 17:20:44 |
| R50.htm | 12036 | 2015-02-23 17:20:44 |
| R51.htm | 228159 | 2015-02-23 17:20:44 |
| R52.htm | 8975 | 2015-02-23 17:20:44 |
| R53.htm | 12702 | 2015-02-23 17:20:44 |
| R54.htm | 57740 | 2015-02-23 17:20:44 |
| R55.htm | 158522 | 2015-02-23 17:20:44 |
| R56.htm | 116242 | 2015-02-23 17:20:44 |
| R57.htm | 176411 | 2015-02-23 17:20:44 |
| R58.htm | 6732 | 2015-02-23 17:20:44 |
| R59.htm | 26048 | 2015-02-23 17:20:44 |
| R6.htm | 173732 | 2015-02-23 17:20:44 |
| R60.htm | 151934 | 2015-02-23 17:20:44 |
| R61.htm | 73518 | 2015-02-23 17:20:44 |
| R62.htm | 164573 | 2015-02-23 17:20:44 |
| R63.htm | 74814 | 2015-02-23 17:20:44 |
| R64.htm | 17486 | 2015-02-23 17:20:44 |
| R65.htm | 41843 | 2015-02-23 17:20:44 |
| R66.htm | 15085 | 2015-02-23 17:20:44 |
| R67.htm | 31942 | 2015-02-23 17:20:44 |
| R68.htm | 141378 | 2015-02-23 17:20:44 |
| R69.htm | 25384 | 2015-02-23 17:20:44 |
| R7.htm | 13554 | 2015-02-23 17:20:44 |
| R70.htm | 12469 | 2015-02-23 17:20:44 |
| R71.htm | 309630 | 2015-02-23 17:20:44 |
| R72.htm | 6159 | 2015-02-23 17:20:44 |
| R73.htm | 52464 | 2015-02-23 17:20:44 |
| R74.htm | 42630 | 2015-02-23 17:20:44 |
| R75.htm | 58144 | 2015-02-23 17:20:44 |
| R76.htm | 17938 | 2015-02-23 17:20:44 |
| R77.htm | 63175 | 2015-02-23 17:20:44 |
| R78.htm | 63973 | 2015-02-23 17:20:44 |
| R79.htm | 6552 | 2015-02-23 17:20:44 |
| R8.htm | 24751 | 2015-02-23 17:20:44 |
| R80.htm | 11120 | 2015-02-23 17:20:44 |
| R81.htm | 75588 | 2015-02-23 17:20:44 |
| R82.htm | 44660 | 2015-02-23 17:20:44 |
| R83.htm | 50599 | 2015-02-23 17:20:44 |
| R84.htm | 50995 | 2015-02-23 17:20:44 |
| R85.htm | 20711 | 2015-02-23 17:20:44 |
| R86.htm | 24589 | 2015-02-23 17:20:44 |
| R9.htm | 7665 | 2015-02-23 17:20:44 |
| report.css | 2740 | 2015-02-23 17:20:44 |
| Show.js | 1410 | 2015-02-23 17:20:44 |
| sps-20141231.xml | 4599702 | 2015-02-23 17:20:44 |
| sps-20141231.xsd | 113916 | 2015-02-23 17:20:44 |
| sps-20141231_cal.xml | 127016 | 2015-02-23 17:20:44 |
| sps-20141231_def.xml | 550622 | 2015-02-23 17:20:44 |
| sps-20141231_lab.xml | 1377541 | 2015-02-23 17:20:44 |
| sps-20141231_pre.xml | 795929 | 2015-02-23 17:20:44 |
| sps1231201410-k.htm | 2438346 | 2015-02-23 17:20:44 |
| spsex120110k2014.htm | 40991 | 2015-02-23 17:20:44 |
| spsex230110k2014.htm | 3941 | 2015-02-23 17:20:44 |
| spsex310110k2014.htm | 12157 | 2015-02-23 17:20:44 |
| spsex310210k2014.htm | 12194 | 2015-02-23 17:20:44 |
| spsex320110k2014.htm | 9341 | 2015-02-23 17:20:44 |
| spsex990110k2014.htm | 15043 | 2015-02-23 17:20:44 |