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Summary of Significant Accounting Policies (Details 4) (USD $) In Thousands, unless otherwise specified	Jan. 05, 2012	Dec. 31, 2011
Cash	$ 19,779
Common Shares (1,940,413 shares)	10,197
Pst Eletronica Ltda [Member]
Fair value of consideration transferred	29,976
Fair value of the Company's previously held equity interest		104,118
Pst Eletronica Ltda [Member] | Noncontrolling Interest [Member]
Cash		29,669
Common Shares (1,940,413 shares)		15,310
Fair value of consideration transferred		44,979
Fair value of the Company's previously held equity interest		104,118
Fair value of noncontrolling interest		48,727
Total fair value of PST		$ 197,824

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