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Basis of Presentation and New Accounting Pronouncements (Tables) | 3 Months Ended
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Mar. 31, 2018
Accounting Policies [Abstract] |
Summary of Activity in Allowance for Doubtful Accounts | Activity in the allowance for doubtful accounts was as follows:
Three Months Ended March 31, 2018 |  |  |
Balance, beginning of period | $ | 973 |
Additions charged to costs |  | 287 |
Recoveries recognized in costs |  | (245 | )
Write-offs | $ | 9 |
Balance, end of period | $ | 1,024 |
Summary of Financial Statement Affected by Application of ASU 2014-09 and Related Amendments | The amount by which each financial statement line item was affected by application of ASU 2014-09 and related amendments during the three-month period ended March 31, 2018 is as follows:
|  | Revenue Based on Previously Effective Guidance |  |  | New Revenue Standard Adjustment |  |  | Revenue Based on New Revenue Standard |
Three Months Ended March 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Product revenues |  | $ | 261,209 |  |  | $ | 680 |  |  | $ | 261,889 |
Income tax expense |  |  | 3,177 |  |  |  | (141 | ) |  |  | 3,036 |
Net income |  |  | 12,427 |  |  |  | 539 |  |  |  | 12,966 |
Basic earnings per share |  |  | 0.34 |  |  |  | 0.01 |  |  |  | 0.35 |
Diluted earnings per share |  |  | 0.34 |  |  |  | 0.01 |  |  |  | 0.35 |
Note 2 – Basis of Presentation and New Accounting Pronouncements – Continued
|  | Revenue Based on Previously Effective Guidance |  |  | New Revenue Standard Adjustment |  |  | Revenue Based on New Revenue Standard |
March 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Balance Sheet |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable, net of allowance for doubtful accounts |  | $ | 196,616 |  |  | $ | — |  |  | $ | 196,616 |
Accrued liabilities |  | $ | 69,482 |  |  | $ | 3,426 |  |  | $ | 72,908 |
Unearned Revenue |  | $ | 3,374 |  |  | $ | 3,426 |  |  | $ | 6,800 |
Deferred income taxes, net |  | $ | 78,218 |  |  | $ | 700 |  |  | $ | 78,918 |
Accumulated earnings |  | $ | 337,758 |  |  | $ | (2,726 | ) |  | $ | 335,032 |

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- Definition Tabular disclosure of credit losses for current financing receivables (such as trade and accounts receivable), including a rollforward of the balance. An alternative caption includes allowance for doubtful accounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22580-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e765-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22499-107794 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(b)(6)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22583-107794 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e725-108305 + Details
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