SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance beginning of period	$ 13,476	$ 7,354	$ 1,246
Additions (deductions) charged	4,793	8,917	7,933
Changes to Reserves	3,075	2,795	1,825
Balance end of period	15,194	13,476	7,354
Revenue Allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance beginning of period	12,185	10,752	9,879
Additions (deductions) charged	28,312	20,237	16,401
Changes to Reserves	24,265	18,804	15,528
Balance end of period	16,232	12,185	10,752
Valuation Allowance on Deferred Tax Assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance beginning of period	29,061	29,726	26,325
Additions (deductions) charged	2,274	(1,812)	(1,545)
Changes to Reserves	(419)	1,147	4,946
Balance end of period	$ 30,916	$ 29,061	$ 29,726