SCHEDULE I - CONDENSED FINANCIAL INFORMATION (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
ASSETS
TOTAL ASSETS	$ 899,287	$ 983,263
Liabilities and Stockholder's Equity
Other current liabilities	11,767	9,260
Total stockholders’ equity	364,313	407,637
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	899,287	983,263
Parent Company
ASSETS
Accounts receivable from subsidiary	104,244	101,504
Investment in subsidiaries	309,591	342,810
Claims for income tax refunds	196	(16)
Deferred income tax asset	(24)	(24)
TOTAL ASSETS	414,007	444,274
Liabilities and Stockholder's Equity
Accounts payable to subsidiaries	1,909	1,909
Other current liabilities	39,522	26,285
Total stockholders’ equity	372,576	416,080
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 414,007	$ 444,274