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NOTE PAYABLE AND LINES OF CREDIT (Details) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Dec. 13, 2017 USD ($) | Dec. 31, 2017 USD ($) item | Dec. 31, 2016 USD ($) item | Dec. 31, 2015 USD ($) | Feb. 01, 2015 USD ($)
NOTE PAYABLE AND LINES OF CREDIT |  |  |  |  |
Capital to Risk Weighted Assets |  | 15.40% | 12.90% |  |
Frost Bank | Line of Credit |  |  |  |  |
NOTE PAYABLE AND LINES OF CREDIT |  |  |  |  |
Revolving line of credit available | $ 30,000 |  |  |  |
Revolving line of credit draw period | 12 months |  |  |  |
Debt term | 60 months |  |  |  |
Line of credit payment terms | payable quarterly in the first 12 months and thereafter quarterly principal and interest payments are required over a term of 60 months |  |  |  |
Outstanding borrowings |  | $ 0 |  |  |
Federal Home Loan Bank | Line of Credit |  |  |  |  |
NOTE PAYABLE AND LINES OF CREDIT |  |  |  |  |
Total borrowing capacity available |  | 793,300 | $ 767,800 |  |
Outstanding borrowings |  | 0 | 0 |  |
Federal Home Loan Bank | Federal funds line of credit |  |  |  |  |
NOTE PAYABLE AND LINES OF CREDIT |  |  |  |  |
Revolving line of credit available |  | 75,000 | $ 75,000 |  |
Outstanding borrowings |  | $ 0 |  |  |
Number of federal funds line of credit | item |  | 4 | 4 |  |
Minimum | Frost Bank | Line of Credit |  |  |  |  |
NOTE PAYABLE AND LINES OF CREDIT |  |  |  |  |
Tangible Capital | $ 240,000 |  |  |  |
Free cash flow coverage ratio | 125.00% |  |  |  |
Maximum | Frost Bank | Line of Credit |  |  |  |  |
NOTE PAYABLE AND LINES OF CREDIT |  |  |  |  |
Capital to Risk Weighted Assets | 12.00% |  |  |  |
Maximum | Frost Bank | Line of Credit | TEXAS |  |  |  |  |
NOTE PAYABLE AND LINES OF CREDIT |  |  |  |  |
Capital to Risk Weighted Assets | 15.00% |  |  |  |
Notes payable |  |  |  |  |
NOTE PAYABLE AND LINES OF CREDIT |  |  |  |  |
Loan amount |  |  |  |  | $ 31,000
Interest paid |  | $ 1,078 | $ 1,063 | $ 758 |

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- Definition Represents the number of federal funds line of credit. + References No definition available. + Details
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- Definition Total Capital divided by risk weighted assets as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for a specific purpose other than for financing goods acquired for inventory or imminent delivery to a customer. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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