| NATURE OF OPERATIONS AND ACCOUNTING POLICIES ERA Savings Plan (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 0 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
| Dec. 31, 2013 | Jan. 02, 2014
 Subsequent Event [Member] | Dec. 31, 2012
 SEACOR [Member] | Dec. 31, 2011
 SEACOR [Member] | |
| Defined Contribution Pension and Other Postretirement Plans [Line Items] | ||||
| Employer matching contribution, percent | 50.00% | |||
| Employer matching contribution, percent of employees' gross pay | 6.00% | 3.00% | ||
| Employer contribution | $ 1.1 | $ 1.0 | $ 0.9 | |
| X | ||||||||||
| 
- Details 
 | 
| X | ||||||||||
| 
- Definition Defined Contribution Plan, Employer Matching Contribution, Percent of Match No definition available. 
 | 
| X | ||||||||||
| 
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. No definition available. 
 | 
| X | ||||||||||
| 
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. No definition available. 
 |