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INCOME TAXES (Summary of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
INCOME TAXES |  |  |
Unrecognized tax benefits related to deferred tax assets and federal tax benefit of state income tax items | $ 16,600 |  |
Decrease in provision for income taxes due to reduction of gross unrecognized tax benefits | 2,600 |  |
Accrued interest and penalties | 400 | $ 400 |
Unrecognized tax benefits |  |  |
Beginning balance-gross unrecognized tax benefits (UTB's) | 22,694 | 45,382 | $ 45,430
Additions based on tax positions related to the current year |  | 48 | 142
Reductions for tax positions related to prior years |  | (835) | (190)
Lapse of statute of limitations | (2,557) | (21,901) |
Ending balance-gross unrecognized tax benefits (UTB's) | 20,137 | 22,694 | 45,382
UTB's as a credit in deferred taxes | 14,604 | 14,604 | 33,021
Federal benefit of state taxes | 2,063 | 2,063 | 2,176
UTB's that would impact the effective tax rate | $ 3,470 | $ 6,027 | $ 10,185

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 + Details
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