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SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS Prior Period Statements of Cash Flows Adjustments, Adoption of ASU 2014-09 (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | [1] | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Net income | $ (16,898) | $ 16,506 | $ 13,902 | $ 14,099 | $ 14,303 | $ 12,809 | $ 11,407 | $ 10,379 | $ 27,609 | $ 48,898 | $ 39,152
Deferred income taxes |  |  |  |  |  |  |  |  | 15,838 | (638) | (5,508)
Accounts receivable |  |  |  |  |  |  |  |  | (10,479) | 751 | 4,144
Prepaid expenses and other assets |  |  |  |  |  |  |  |  | (17,646) | (2,524) | 3,342
Taxes payable and accrued liabilities |  |  |  |  |  |  |  |  | $ 20,041 | (1,124) | (75)
Increase (Decrease) in Deferred Income |  |  |  |  |  |  |  |  |  | 0 | 0
As Reported |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  | 47,890 | 39,147
Deferred income taxes |  |  |  |  |  |  |  |  |  | (660) | (5,416)
Accounts receivable |  |  |  |  |  |  |  |  |  | 650 | 4,131
Prepaid expenses and other assets |  |  |  |  |  |  |  |  |  | (2,499) | 3,391
Taxes payable and accrued liabilities |  |  |  |  |  |  |  |  |  | (1,124) | (76)
Increase (Decrease) in Deferred Income |  |  |  |  |  |  |  |  |  | 1,106 | (122)
Adjustments for Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  | 1,008 | 5
Deferred income taxes |  |  |  |  |  |  |  |  |  | 22 | (92)
Accounts receivable |  |  |  |  |  |  |  |  |  | 101 | 13
Prepaid expenses and other assets |  |  |  |  |  |  |  |  |  | (25) | (49)
Taxes payable and accrued liabilities |  |  |  |  |  |  |  |  |  | 0 | 1
Increase (Decrease) in Deferred Income |  |  |  |  |  |  |  |  |  | $ (1,106) | $ 122
[1] | In December 2017 the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (Refer to Note 11, Provision for Income Taxes, in the Notes to Consolidated Financial Statements).

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