Restructuring Charges: Workforce Reduction Activities	12 Months Ended
Restructuring Charges: Workforce Reduction Activities	Dec. 31, 2011
Restructuring Charges: Workforce Reduction Activities [Abstract]
Restructuring Charges: Workforce Reduction Activities	20. Restructuring Charges: Workforce Reduction Activities On May 7, 2009, the Company announced actions it had taken or would be taking as part of an ongoing effort to manage expenses and cost structure. These actions included a reduction of approximately 6% of the Company's global workforce. During the year ended December 31, 2009, the planned restructuring activities were completed and the Company recorded related restructuring charges of approximately $3.7 million.

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

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