CONSOLIDATED BALANCE SHEETS (Parentheticals) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
ASSETS
Trade accounts receivable, allowance for uncollectible accounts	$ 3,946	$ 4,985
Funds held for customers, assets carried at fair value	26,282	34,450
Revenue in excess of billings, allowance for uncollectible accounts	830
Accumulated depreciation	379,141	377,180
Accumulated amortization	$ 555,739	$ 557,023
Shareholders' equity:
Common stock, par value (per share)	$ 1.00	$ 1.00
Common stock, shares authorized	500,000	500,000
Common stock, shares outstanding	41,691	42,126