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RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Alliance Bank [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Cash deposits with related party | $ 0 | $ 9,678 |
Interest income on cash deposits placed with affiliated entity | 48,000 | 137,000 | $ 430,000
Payments to aviation charter [Member] | Steve Hilton, Chairman and CEO [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Payments to related parties | 711,000 | 695,000 | $ 598,000
Payments to aviation charter [Member] | Robert Sarver, director [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Payments to related parties | 43,000 |  |
Affiliate entity, a custodian of ICS [Member] | Alliance Bank [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Cash deposits with related party | $ 0 | $ 100,100,000 |

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- Definition Amount of interest income earned from interest-bearing assets owed to the entity by related party. + References No definition available. + Details
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- Definition Amount of transactions with related party during the financial reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864 + Details
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- Details
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- Details
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