Income Taxes	6 Months Ended
Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective income tax rate was 32.9% for the six months ended June 30, 2015. The effective income tax rate for the 2015 period was below the U.S. federal statutory rate of 35.0% primarily due to the benefit of state tax credits, the domestic manufacturing deduction, income attributable to noncontrolling interests, the non-recognition of tax related to the bargain purchase of a controlling interest in Suzhou Huasu Plastics Co., Ltd. and the foreign earnings rate differential, partially offset by state income taxes. The effective income tax rate was 34.9% for the six months ended June 30, 2014. The effective income tax rate for the 2014 period was below the U.S. federal statutory rate of 35.0% primarily due to state tax credits and the domestic manufacturing deduction, mostly offset by state income taxes. There were no unrecognized tax benefits for the six months ended June 30, 2015. The Company recognizes penalties and interest accrued related to unrecognized tax benefits in income tax expense. As of June 30, 2015, the Company had no accrued interest and penalties related to uncertain tax positions. The Company files income tax returns in the U.S. federal jurisdiction, various states and foreign jurisdictions. The Company is no longer subject to examinations by tax authorities before the year 2010.

Income Taxes

6 Months Ended

Jun. 30, 2015

The effective income tax rate was 32.9% for the six months ended June 30, 2015. The effective income tax rate for the 2015 period was below the U.S. federal statutory rate of 35.0% primarily due to the benefit of state tax credits, the domestic manufacturing deduction, income attributable to noncontrolling interests, the non-recognition of tax related to the bargain purchase of a controlling interest in Suzhou Huasu Plastics Co., Ltd. and the foreign earnings rate differential, partially offset by state income taxes. The effective income tax rate was 34.9% for the six months ended June 30, 2014. The effective income tax rate for the 2014 period was below the U.S. federal statutory rate of 35.0% primarily due to state tax credits and the domestic manufacturing deduction, mostly offset by state income taxes.

There were no unrecognized tax benefits for the six months ended June 30, 2015. The Company recognizes penalties and interest accrued related to unrecognized tax benefits in income tax expense. As of June 30, 2015, the Company had no accrued interest and penalties related to uncertain tax positions.

The Company files income tax returns in the U.S. federal jurisdiction, various states and foreign jurisdictions. The Company is no longer subject to examinations by tax authorities before the year 2010.