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Ownership, Description of Business, and Summary of Significant Accounting Policies - Reconciliation of Shares Used in Calculating Earnings Per Basic and Diluted Shares (Detail) - shares | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Accounting Policies [Abstract] |  |  |
Weighted average common shares outstanding-basic (in shares) | 25,722,000 | 25,853,000 | 24,659,000
Dilutive effect of stock-based awards (in shares) | 253,000 | 556,000 | 950,000
Dilutive effect of convertible senior notes (in shares) | 672,000 | 1,082,000 | 595,000
Dilutive effect of warrants (in shares) | 0 | 4,000 | 0
Weighted average common shares outstanding-diluted (in shares) | 26,647,000 | 27,495,000 | 26,204,000
Anti-dilutive employee stock options outstanding, value | 0 | 0 | 0

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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