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Fair Value Measurement (Tables) | 6 Months Ended
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Jun. 30, 2016
Fair Value Disclosures [Abstract] |
Summary of Marketable Securities Measured at Fair Value on Recurring Basis | The following table summarizes the Company’s marketable securities at June 30, 2016 and December 31, 2015 measured at fair value on a recurring basis (in thousands):
|  | June 30, 2016 |  |  | December 31, 2015 |
|  | Cost |  |  | Gross Unrealized Gains (Losses) |  |  | Recorded Basis |  |  | Cost |  |  | Gross Unrealized Gains (Losses) |  |  | Recorded Basis |
Current: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash Equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  | $ | 4,830 |  |  | $ | 0 |  |  | $ | 4,830 |  |  | $ | 21,312 |  |  | $ | 0 |  |  | $ | 21,312 |
Available for Sale - Restricted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  |  | 48,371 |  |  |  | 0 |  |  |  | 48,371 |  |  |  | 76,023 |  |  |  | 0 |  |  |  | 76,023 |
Certificate of Deposit |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 10,000 |  |  |  | 0 |  |  |  | 10,000 |
Total Current Investments |  |  | 53,201 |  |  |  | 0 |  |  |  | 53,201 |  |  |  | 107,335 |  |  |  | 0 |  |  |  | 107,335 |
Long term: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal Bonds |  |  | 1,500 |  |  |  | 1 |  |  |  | 1,501 |  |  |  | 3,135 |  |  |  | (3 | ) |  |  | 3,132 |
Corporate Bonds |  |  | 863 |  |  |  | (2 | ) |  |  | 861 |  |  |  | 2,970 |  |  |  | (24 | ) |  |  | 2,946 |
Money Market Funds |  |  | 94 |  |  |  | 0 |  |  |  | 94 |  |  |  | 4 |  |  |  | 0 |  |  |  | 4 |
Available for Sale - Restricted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  |  | 221,728 |  |  |  | 0 |  |  |  | 221,728 |  |  |  | 175,869 |  |  |  | 0 |  |  |  | 175,869 |
Certificates of Deposit |  |  | 11,776 |  |  |  | (1 | ) |  |  | 11,775 |  |  |  | 496 |  |  |  | (1 | ) |  |  | 495 |
U.S. Treasuries |  |  | 5,280 |  |  |  | 17 |  |  |  | 5,297 |  |  |  | 4,752 |  |  |  | 1 |  |  |  | 4,753 |
Corporate Bonds |  |  | 3,217 |  |  |  | 8 |  |  |  | 3,225 |  |  |  | 2,996 |  |  |  | (24 | ) |  |  | 2,972 |
Municipal Bonds |  |  | 3,160 |  |  |  | 12 |  |  |  | 3,172 |  |  |  | 3,613 |  |  |  | (1 | ) |  |  | 3,612 |
Total Long Term Investments |  |  | 247,618 |  |  |  | 35 |  |  |  | 247,653 |  |  |  | 193,835 |  |  |  | (52 | ) |  |  | 193,783 |
Total Investments |  | $ | 300,819 |  |  | $ | 35 |  |  | $ | 300,854 |  |  | $ | 301,170 |  |  | $ | (52 | ) |  | $ | 301,118 |
Summary of Assets Measured at Fair Value on Recurring Basis | The following table summarizes the Company’s financial assets at June 30, 2016 and December 31, 2015 measured at fair value on a recurring basis by fair value hierarchy level (in thousands):
|  | June 30, 2016 |  |  | December 31, 2015 |
|  | Total Recorded Basis |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total Recorded Basis |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Cash Equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market |  | $ | 4,830 |  |  | $ | 0 |  |  | $ | 4,830 |  |  | $ | 0 |  |  | $ | 21,312 |  |  | $ | 0 |  |  | $ | 21,312 |  |  | $ | 0 |
Available for Sale - Unrestricted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal Bonds |  |  | 1,501 |  |  |  | 50 |  |  |  | 1,451 |  |  |  | 0 |  |  |  | 3,132 |  |  |  | 241 |  |  |  | 2,891 |  |  |  | 0 |
Corporate Bonds |  |  | 861 |  |  |  | 401 |  |  |  | 460 |  |  |  | 0 |  |  |  | 2,946 |  |  |  | 2,291 |  |  |  | 655 |  |  |  | 0 |
Money Market Funds |  |  | 94 |  |  |  | 0 |  |  |  | 94 |  |  |  | 0 |  |  |  | 4 |  |  |  | 0 |  |  |  | 4 |  |  |  | 0 |
Available for Sale - Restricted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market |  |  | 270,099 |  |  |  | 888 |  |  |  | 269,211 |  |  |  | 0 |  |  |  | 251,892 |  |  |  | 17 |  |  |  | 251,875 |  |  |  | 0 |
Certificates of Deposit |  |  | 11,775 |  |  |  | 0 |  |  |  | 11,775 |  |  |  | 0 |  |  |  | 10,495 |  |  |  | 0 |  |  |  | 10,495 |  |  |  | 0 |
U.S. Treasuries |  |  | 5,297 |  |  |  | 5,297 |  |  |  | 0 |  |  |  | 0 |  |  |  | 4,753 |  |  |  | 4,753 |  |  |  | 0 |  |  |  | 0 |
Corporate Bonds |  |  | 3,225 |  |  |  | 2,174 |  |  |  | 1,051 |  |  |  | 0 |  |  |  | 2,972 |  |  |  | 2,285 |  |  |  | 687 |  |  |  | 0 |
Municipal Bonds |  |  | 3,172 |  |  |  | 213 |  |  |  | 2,959 |  |  |  | 0 |  |  |  | 3,612 |  |  |  | 389 |  |  |  | 3,223 |  |  |  | 0 |
Total Available for Sale Securities |  |  | 296,024 |  |  |  | 9,023 |  |  |  | 287,001 |  |  |  | 0 |  |  |  | 279,806 |  |  |  | 9,976 |  |  |  | 269,830 |  |  |  | 0 |
Total Investments |  | $ | 300,854 |  |  | $ | 9,023 |  |  | $ | 291,831 |  |  | $ | 0 |  |  | $ | 301,118 |  |  | $ | 9,976 |  |  | $ | 291,142 |  |  | $ | 0 |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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