SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of Property and Equipment and Depreciation Expense

We recognized the following depreciation expense (in thousands):

2018	$	45,155
2017	42,817
2016	36,212

A summary of our property and equipment as of December 31, is as follows (in thousands):

	Useful Lives (in years)	2018			2017
Furniture, fixtures, and equipment	3 to 12	$	272,733		$	277,014
Buildings	3 to 30	130,959			130,712
Corporate aircraft	10	11,337			11,334
Leasehold improvements	3 to 15	58,929			50,616
Land		23,648			23,658
Construction in progress		1,241			4,575
Less: accumulated depreciation and amortization		(270,546		)	(267,583		)
Net property and equipment		$	228,301		$	230,326

Schedule of Amortization Expense of Software

We recognized the following amortization expense of purchased and internally developed software (in thousands):

2018	$	14,688
2017	13,887
2016	11,404

Schedule of Other Assets, Noncurrent

A summary of our purchased and internally developed software as of December 31, is as follows (in thousands):

	2018			2017
Purchased software	$	32,460		$	25,805
Internally developed software	68,853			55,165
Less accumulated amortization	(66,638		)	(54,194		)
Net software	$	34,675		$	26,776