Significant Policies Update (Notes)	6 Months Ended
Jun. 30, 2018
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	Significant Policies Update - Revenue Recognition The Company's significant accounting policies are detailed in Note 2 - Significant Accounting Policies of its Annual Report on Form 10-K for the year ended December 31, 2017. Significant changes to the accounting policies as a result of adopting the new revenue recognition guidance on January 1, 2018 are discussed below. The Company generates revenue by providing its customers with flexible and rigid plastic packaging serving a variety of markets including food, consumer products and healthcare end markets. The Company enters into a variety of agreements with customers, including quality agreements, pricing agreements and master supply agreements which outline the terms under which the Company does business with a specific customer. The Company also sells to some customers solely based on purchase orders. The Company has concluded for the vast majority of its revenues, that its contracts with customers are either a purchase order or the combination of a purchase order with a master supply agreement. All revenue recognized in the income statement is considered to be revenue from contracts with customers. The Company typically satisfies the obligation to provide packaging to customers at a point in time upon shipment when control is transferred to customers. Revenue is recognized net of allowances for returns and customer claims and any taxes collected from customers, which are subsequently remitted to governmental authorities. The Company does not have contract assets or contract liabilities. The Company disaggregates revenue based on geography. Disaggregation of revenue is presented in Note 15 - Segments of Business. Significant Judgments Determining whether products and services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. The Company identified potential performance obligations in its customer master supply agreements and determined that none of them are capable of being distinct as the customer can only benefit from the supplied packaging. Therefore, the Company has concluded that it has one performance obligation to supply packaging to customers. The Company may provide variable consideration in several forms which are determined through its agreements with customers. The Company can offer prompt payment discounts, sales rebates or other incentive payments to customers. Sales rebates and other incentive payments are typically awarded upon achievement of certain performance metrics, including volume. The Company accounts for variable consideration using the most likely amount method. The Company utilizes forecasted sales data and rebate percentages specific to each customer agreement and updates its judgment of the amounts to which the customer is entitled each period. The Company enters into long term agreements with certain customers, under which it is obligated to make various up-front payments for which it expects to receive a benefit in excess of the cost over the term of the contract. These up-front payments are deferred and reflected in prepaid expenses and other current assets or deferred charges and other assets on its consolidated balance sheet. Contract incentives are typically recognized as a reduction to revenue over the term of the customer agreement. Practical Expedients The Company sells primarily through its direct sales force. Any external sales commissions are expensed when incurred because the amortization period would be one year or less. External sales commission expense is included in selling, general and administrative expense on its consolidated statement of income. The Company accounts for shipping and handling activities as fulfillment costs. Accordingly, shipping and handling costs are classified as a component of cost of products sold while amounts billed to customers are classified as a component of net sales. The Company excluded from the measurement of the transaction price all taxes assessed by a government authority that are both imposed on and concurrent with a specific revenue producing transaction and collected from the customer, including sales taxes, value added taxes, excise taxes and use taxes. Accordingly, the tax amounts are not included in net sales.

Significant Policies Update - Revenue Recognition

The Company's significant accounting policies are detailed in Note 2 - Significant Accounting Policies of its Annual Report on Form 10-K for the year ended December 31, 2017. Significant changes to the accounting policies as a result of adopting the new revenue recognition guidance on January 1, 2018 are discussed below.

The Company generates revenue by providing its customers with flexible and rigid plastic packaging serving a variety of markets including food, consumer products and healthcare end markets. The Company enters into a variety of agreements with customers, including quality agreements, pricing agreements and master supply agreements which outline the terms under which the Company does business with a specific customer. The Company also sells to some customers solely based on purchase orders. The Company has concluded for the vast majority of its revenues, that its contracts with customers are either a purchase order or the combination of a purchase order with a master supply agreement. All revenue recognized in the income statement is considered to be revenue from contracts with customers.

The Company typically satisfies the obligation to provide packaging to customers at a point in time upon shipment when control is transferred to customers. Revenue is recognized net of allowances for returns and customer claims and any taxes collected from customers, which are subsequently remitted to governmental authorities. The Company does not have contract assets or contract liabilities. The Company disaggregates revenue based on geography. Disaggregation of revenue is presented in Note 15 - Segments of Business.

Significant Judgments

Determining whether products and services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. The Company identified potential performance obligations in its customer master supply agreements and determined that none of them are capable of being distinct as the customer can only benefit from the supplied packaging. Therefore, the Company has concluded that it has one performance obligation to supply packaging to customers.

The Company may provide variable consideration in several forms which are determined through its agreements with customers. The Company can offer prompt payment discounts, sales rebates or other incentive payments to customers. Sales rebates and other incentive payments are typically awarded upon achievement of certain performance metrics, including volume. The Company accounts for variable consideration using the most likely amount method. The Company utilizes forecasted sales data and rebate percentages specific to each customer agreement and updates its judgment of the amounts to which the customer is entitled each period.

The Company enters into long term agreements with certain customers, under which it is obligated to make various up-front payments for which it expects to receive a benefit in excess of the cost over the term of the contract. These up-front payments are deferred and reflected in prepaid expenses and other current assets or deferred charges and other assets on its consolidated balance sheet. Contract incentives are typically recognized as a reduction to revenue over the term of the customer agreement.

Practical Expedients

The Company sells primarily through its direct sales force. Any external sales commissions are expensed when incurred because the amortization period would be one year or less. External sales commission expense is included in selling, general and administrative expense on its consolidated statement of income.

The Company accounts for shipping and handling activities as fulfillment costs. Accordingly, shipping and handling costs are classified as a component of cost of products sold while amounts billed to customers are classified as a component of net sales.

The Company excluded from the measurement of the transaction price all taxes assessed by a government authority that are both imposed on and concurrent with a specific revenue producing transaction and collected from the customer, including sales taxes, value added taxes, excise taxes and use taxes. Accordingly, the tax amounts are not included in net sales.