RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($)  | 
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015  | 
Dec. 31, 2014  | 
Dec. 31, 2013  | 
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| Alliance Bank [Member] | |||
| Related Party Transaction [Line Items] | |||
| Cash deposits with related party | $ 9,678 | $ 9,995 | |
| Interest income on cash deposits placed with affiliated entity | 137,000 | 430,000 | $ 654,000 | 
| Payments to Aviation Charter [Member] | |||
| Related Party Transaction [Line Items] | |||
| Payments to related parties | 695,000 | 598,000 | $ 421,000 | 
| Affiliate Entity, a Custodian of ICS [Member] | Alliance Bank [Member] | |||
| Related Party Transaction [Line Items] | |||
| Cash deposits with related party | 100,100,000 | ||
| Affiliate Entity, a Custodian of CDARS [Member] | Alliance Bank [Member] | |||
| Related Party Transaction [Line Items] | |||
| Cash deposits with related party | $ 0 | $ 0 | |
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- Definition Cash deposits held in bank accounts with a related party. No definition available. 
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- Definition Amount of interest income earned from interest-bearing assets owed to the entity by related party. No definition available. 
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- Definition Amount of transactions with related party during the financial reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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