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Accounting Policies and Basis of Presentation (Details) (USD $) | 3 Months Ended | 1 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2012 | Apr. 02, 2011 | Jan. 28, 2012 PS International North Carolina | Jan. 02, 2012 PS International North Carolina | Apr. 03, 2010 PS International North Carolina
Equity method investments |  |  |  |  |
Percentage ownership acquired |  |  |  |  | 50.00%
Ownership after increase (as a percent) |  |  | 70.00% |  |
Payment to increase ownership interest in affiliate |  |  | $ 3,660,000 |  |
Total cash paid, net of cash acquired | 2,825,000 |  | 2,825,000 |  |
Increase in working capital |  |  |  | 14,419,000 |
Increase in fixed assets |  |  |  | 163,000 |
Increase in goodwill |  |  |  | 2,590,000 |
Increase in intangible assets |  |  |  | 621,000 |
Increase in other long-term assets |  |  |  | 96,000 |
Increase in non-controlling interest |  |  |  | 5,649,000 |
Decrease in investments in and advances to affiliates |  |  |  | 9,415,000 |
Non-cash, pay-in-kind interest income and accretion of discount recognized on a note receivable from an affiliate | $ 2,818,000 | $ 2,521,000 |  |  |

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