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Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Summary Of Significant Accounting Policies [Abstract] |
Rollforward Analysis of the Allowance Against Accounts Receivable Balance |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | Year Ended December 31,
﻿ |  | 2017 |  | 2016 |  | 2015
﻿ |  | (in thousands)
﻿Allowance for bad debt |  |  |  |  |  |  |  |  |
﻿Balance at beginning of year |  | $ | (5,211) |  | $ | (4,221) |  | $ | (2,400)
﻿Charge to cost and expenses |  |  | (452) |  |  | (1,222) |  |  | (2,699)
﻿Reclassification related to Sojitz acquisition |  |  | (694) |  |  | — |  |  | —
﻿Foreign currency gain (loss) |  |  | (676) |  |  | 232 |  |  | 878
﻿Balance at end of period |  | $ | (7,033) |  | $ | (5,211) |  | $ | (4,221)
﻿ |  |  |  |  |  |  |  |  |
﻿

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- Definition Tabular disclosure of financing receivables (examples of financing receivables include loans, trade accounts receivable and notes receivable) and activity in the allowance for credit losses account. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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