INCOME TAXES Components of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of Income Tax Provision
Current income tax expense	$ 64,100	$ 59,949	$ 42,159
Deferred income tax expense	76,833	90,313	76,094
Benefits of operating loss carryforward	538	60	609
Total income tax provision	$ 141,471	$ 150,322	$ 118,862