Concentration Of Credit Risk - (Details) |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
USD ($)
Customer
| |
| Net Sales | Customer Concentration Risk | |
| Concentration Risk [Line Items] | |
| Number of Customers Used For Concentration Risk Disclosure | Customer | 10 |
| Concentration risk, percentage | 15.20% |
| Maximum percent of revenue from single customer | 3.40% |
| Payment Guarantee | |
| Concentration Risk [Line Items] | |
| Retained recourse obligation | $ 5,863,000 |
| Total contracts | 30,215,000 |
| Other Long-Term Obligations | Payment Guarantee | |
| Concentration Risk [Line Items] | |
| Guarantee obligation at carrying value | $ 113,000 |