Operations and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Estimated Economic Lives of Property and Equipment

We record property and equipment at cost.  We capitalize major improvements and betterments, while maintenance, repairs and minor replacements are expensed as incurred.  Depreciation or amortization is provided using the straight-line method over the following estimated economic lives of the assets:

	Estimated Economic Life
Leasehold improvements	Shorter of underlying lease term or asset life
Furniture and fixtures	2 – 7 years
Equipment	3 – 5 years
Software	3 – 10 years
Buildings	29 years

Reconciliation of Denominators of Basic and Diluted EPS Calculations

A reconciliation of the denominators of the basic and diluted EPS calculations follows (in thousands, except per share data):

	Years Ended December 31,
	2018		2017		2016
Numerator:
Net earnings	$	163,677	$	90,683	$	84,690
Denominator:
Weighted-average shares used to compute basic    EPS		35,586		35,741		36,102
Dilutive potential common shares due to dilutive    RSUs, net of tax effect		423		466		336
Weighted-average shares used to compute    diluted EPS		36,009		36,207		36,438
Net earnings per share:
Basic	$	4.60	$	2.54	$	2.35
Diluted	$	4.55	$	2.50	$	2.32

Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the balance sheets that sum to the total of the same such amounts shown in the statements of cash flows for the years ended December 31, 2018, 2017 and 2016 (in thousands):

	December 31, 2018		December 31, 2017		December 31, 2016
Cash and cash equivalents	$	142,655	$	105,831	$	202,882
Restricted cash included in other current assets		8		46		51
Restricted cash included in other non-current assets		1,630		1,568		3,013
Total cash, cash equivalents and restricted cash    shown in the statement of cash flows	$	144,293	$	107,445	$	205,946