Income Taxes	3 Months Ended
Mar. 31, 2013
Income Taxes [Abstract]
Income Taxes	(6) Income Taxes The provision for income taxes for the three months ended March 31, 2013 totaled $3,762 and resulted in an effective tax rate of 24.8%. For the three months ended March 31, 2013 the effective tax rate includes a benefit of approximately $1,300 due to changes in tax laws and expense of approximately $1,500 related to the sale of an office building. In 2009, a subsidiary of the Company was examined by a European tax authority, which challenged the business purpose of the deductibility of certain intercompany transactions from 2003 and issued two formal assessments against the subsidiary. In 2010, the Company filed appeals to litigate the matter. The first court date related to this matter was held in 2011, after which the court issued its ruling in favor of the Company. The tax authorities appealed this ruling and the appeals court also ruled in the Company's favor in 2012, however this ruling only applies to the smaller of the two assessments. The first court date for the larger of the two assessments was held in September 2012, and the Company has not yet received the court's ruling. For the three months ended March 31, 2013, the Company decreased its reserve for unrecognized tax benefits for this matter by $139, including $177 of foreign currency translation. The Company still believes this dispute to be in the early stages of the judicial process since any ruling reached by any of the courts may be subject to further appeals, and as such the final date of resolution of this matter is uncertain at this time. However, within the next twelve months it is possible that factors such as new developments, settlements or judgments may require the Company to increase its reserve for unrecognized tax benefits by up to approximately $8,000 or decrease its reserve by approximately $6,000, including penalties and interest. If the court rules against the Company in subsequent court proceedings, a payment for a substantial portion of the judgment, including any penalties and interest, will be due immediately while the case is appealed. The Company has analyzed these issues in accordance with guidance on uncertain tax positions and believes at this time that its reserves are adequate, and intends to vigorously defend itself.

Income Taxes

3 Months Ended

Mar. 31, 2013

(6) Income Taxes

The provision for income taxes for the three months ended March 31, 2013 totaled $3,762 and resulted in an effective tax rate of 24.8%. For the three months ended March 31, 2013 the effective tax rate includes a benefit of approximately $1,300 due to changes in tax laws and expense of approximately $1,500 related to the sale of an office building.

In 2009, a subsidiary of the Company was examined by a European tax authority, which challenged the business purpose of the deductibility of certain intercompany transactions from 2003 and issued two formal assessments against the subsidiary. In 2010, the Company filed appeals to litigate the matter. The first court date related to this matter was held in 2011, after which the court issued its ruling in favor of the Company. The tax authorities appealed this ruling and the appeals court also ruled in the Company's favor in 2012, however this ruling only applies to the smaller of the two assessments. The first court date for the larger of the two assessments was held in September 2012, and the Company has not yet received the court's ruling. For the three months ended March 31, 2013, the Company decreased its reserve for unrecognized tax benefits for this matter by $139, including $177 of foreign currency translation. The Company still believes this dispute to be in the early stages of the judicial process since any ruling reached by any of the courts may be subject to further appeals, and as such the final date of resolution of this matter is uncertain at this time. However, within the next twelve months it is possible that factors such as new developments, settlements or judgments may require the Company to increase its reserve for unrecognized tax benefits by up to approximately $8,000 or decrease its reserve by approximately $6,000, including penalties and interest. If the court rules against the Company in subsequent court proceedings, a payment for a substantial portion of the judgment, including any penalties and interest, will be due immediately while the case is appealed. The Company has analyzed these issues in accordance with guidance on uncertain tax positions and believes at this time that its reserves are adequate, and intends to vigorously defend itself.