ACQUISITIONS - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jul. 01, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill	$ 123,244		$ 79,648
Advantage RN, LLC [Member]
Business Acquisition [Line Items]
Cash and cash equivalents		$ 2,833
Accounts receivable		14,396
Other current assets		392
Property and equipment		333
Goodwill		43,596
Other intangible assets		29,900
Total assets acquired		91,450
Accounts payable and accrued expenses		368
Accrued employee compensation and benefits		1,685
Other current liabilities		2
Total liabilities assumed		2,055
Net assets acquired		$ 89,395