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Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Summary Of Significant Accounting Policies [Abstract] |
Rollforward Analysis of the Allowance Against Accounts Receivable Balance |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | Year Ended December 31,
﻿ |  | 2018 |  | 2017 |  | 2016
﻿ |  | (in thousands)
﻿Allowance for bad debt |  |  |  |  |  |  |  |  |
﻿Balance at beginning of year |  | $ | (7,033) |  | $ | (5,211) |  | $ | (4,221)
﻿Bad debt recovery (charge) |  |  | 77 |  |  | (452) |  |  | (1,222)
﻿Reclassification to leasehold costs related to signing bonus |  |  | 4,197 |  |  | — |  |  | —
﻿Reclassification related to Sojitz acquisition |  |  | — |  |  | (694) |  |  | —
﻿Foreign currency gain (loss) |  |  | 224 |  |  | (676) |  |  | 232
﻿Balance at end of period |  | $ | (2,535) |  | $ | (7,033) |  | $ | (5,211)
﻿ |  |  |  |  |  |  |  |  |
﻿
Assets And Liabilities Measured On Recurring Basis |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | As of December 31, 2018
﻿ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
﻿ |  | (in thousands)
﻿Recurring |  |  |  |  |  |  |  |  |  |  |  |
﻿Assets |  |  |  |  |  |  |  |  |  |  |  |
﻿Derivative asset commodity swaps |  | $ | — |  | $ | 3,520 |  | $ | — |  | $ | 3,520
﻿ |  | $ | — |  | $ | 3,520 |  | $ | — |  | $ | 3,520
﻿Liabilities |  |  |  |  |  |  |  |  |  |  |  |
﻿SARs liability |  | $ | — |  | $ | 1,632 |  | $ | — |  | $ | 1,632
﻿ |  | $ | — |  | $ | 1,632 |  | $ | — |  | $ | 1,632
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | As of December 31, 2017
﻿ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
﻿ |  | (in thousands)
﻿Recurring |  |  |  |  |  |  |  |  |  |  |  |
﻿Liabilities |  |  |  |  |  |  |  |  |  |  |  |
﻿SARs liability |  | $ | — |  | $ | 146 |  | $ | — |  | $ | 146
﻿ |  | $ | — |  | $ | 146 |  | $ | — |  | $ | 146
﻿

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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://fasb.org/us-gaap/role/ref/legacyRef -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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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
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