Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-13-101540-index-headers.html | 2013-03-11 18:40:29 | |
| 0001193125-13-101540-index.html | 2013-03-11 18:40:29 | |
| 0001193125-13-101540.txt | 2013-03-11 18:40:29 | |
 0001193125-13-101540-xbrl.zip | 167017 | 2013-03-11 18:40:29 |
| d465961d10k.htm | 1092754 | 2013-03-11 18:40:29 |
| d465961dex211.htm | 3180 | 2013-03-11 18:40:29 |
| d465961dex311.htm | 6670 | 2013-03-11 18:40:29 |
| d465961dex312.htm | 6646 | 2013-03-11 18:40:29 |
| d465961dex321.htm | 3596 | 2013-03-11 18:40:29 |
| d465961dex322.htm | 3724 | 2013-03-11 18:40:29 |
| FilingSummary.xml | 27448 | 2013-03-11 18:40:29 |
| Financial_Report.xls | 610216 | 2013-03-11 18:40:29 |
 g465961g28m21.jpg | 21488 | 2013-03-11 18:40:29 |
 g465961g94b35.jpg | 19116 | 2013-03-11 18:40:29 |
| psix-20121231.xml | 659206 | 2013-03-11 18:40:29 |
| psix-20121231.xsd | 76451 | 2013-03-11 18:40:29 |
| psix-20121231_cal.xml | 76326 | 2013-03-11 18:40:29 |
| psix-20121231_def.xml | 325343 | 2013-03-11 18:40:29 |
| psix-20121231_lab.xml | 523793 | 2013-03-11 18:40:29 |
| psix-20121231_pre.xml | 382383 | 2013-03-11 18:40:29 |
| R1.htm | 39431 | 2013-03-11 18:40:29 |
| R10.htm | 15968 | 2013-03-11 18:40:29 |
| R11.htm | 5832 | 2013-03-11 18:40:29 |
| R12.htm | 21034 | 2013-03-11 18:40:29 |
| R13.htm | 32957 | 2013-03-11 18:40:29 |
| R14.htm | 10538 | 2013-03-11 18:40:29 |
| R15.htm | 11079 | 2013-03-11 18:40:29 |
| R16.htm | 16639 | 2013-03-11 18:40:29 |
| R17.htm | 3804 | 2013-03-11 18:40:29 |
| R18.htm | 50399 | 2013-03-11 18:40:29 |
| R19.htm | 52803 | 2013-03-11 18:40:29 |
| R2.htm | 118653 | 2013-03-11 18:40:29 |
| R20.htm | 10128 | 2013-03-11 18:40:29 |
| R21.htm | 126091 | 2013-03-11 18:40:29 |
| R22.htm | 24888 | 2013-03-11 18:40:29 |
| R23.htm | 20674 | 2013-03-11 18:40:29 |
| R24.htm | 21985 | 2013-03-11 18:40:29 |
| R25.htm | 8438 | 2013-03-11 18:40:29 |
| R26.htm | 57921 | 2013-03-11 18:40:29 |
| R27.htm | 68005 | 2013-03-11 18:40:29 |
| R28.htm | 11313 | 2013-03-11 18:40:29 |
| R29.htm | 11299 | 2013-03-11 18:40:29 |
| R3.htm | 32347 | 2013-03-11 18:40:29 |
| R30.htm | 12009 | 2013-03-11 18:40:29 |
| R31.htm | 39340 | 2013-03-11 18:40:29 |
| R32.htm | 44087 | 2013-03-11 18:40:29 |
| R33.htm | 30993 | 2013-03-11 18:40:29 |
| R34.htm | 5440 | 2013-03-11 18:40:29 |
| R35.htm | 12142 | 2013-03-11 18:40:29 |
| R36.htm | 36895 | 2013-03-11 18:40:29 |
| R37.htm | 8544 | 2013-03-11 18:40:29 |
| R38.htm | 15112 | 2013-03-11 18:40:29 |
| R39.htm | 58133 | 2013-03-11 18:40:29 |
| R4.htm | 94524 | 2013-03-11 18:40:29 |
| R40.htm | 5738 | 2013-03-11 18:40:29 |
| R41.htm | 31114 | 2013-03-11 18:40:29 |
| R42.htm | 46869 | 2013-03-11 18:40:29 |
| R43.htm | 41154 | 2013-03-11 18:40:29 |
| R44.htm | 56749 | 2013-03-11 18:40:29 |
| R45.htm | 52037 | 2013-03-11 18:40:29 |
| R46.htm | 15554 | 2013-03-11 18:40:29 |
| R47.htm | 166215 | 2013-03-11 18:40:29 |
| R48.htm | 22687 | 2013-03-11 18:40:29 |
| R5.htm | 41783 | 2013-03-11 18:40:29 |
| R6.htm | 150576 | 2013-03-11 18:40:29 |
| R7.htm | 51503 | 2013-03-11 18:40:29 |
| R8.htm | 4435 | 2013-03-11 18:40:29 |
| R9.htm | 12895 | 2013-03-11 18:40:29 |
| report.css | 2721 | 2013-03-11 18:40:29 |
| Show.js | 6423 | 2013-03-11 18:40:29 |