Summary of Significant Accounting Policies (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019	Jan. 01, 2018	Dec. 31, 2014
Summary Of Significant Accounting Policies [Line Items]
Aggregate amount of transaction price allocated to remaining performance obligations	$ 1,000,000
Remaining performance obligations expected to be recognized, year	2028
Restricted cash	$ 2,700	$ 3,000
Proceeds from sale/maturity of short-term investments	52,135	190,778	$ 193,465
Research and development	127,994	124,034	$ 113,215
Common stock warrants issued, per warrant						$ 26.68
Equity method investments, additional investment	4,000
Equity method investment, carrying value	6,600	$ 2,800
Operating lease right-of-use assets	94,847
Lease liabilities	$ 101,378
Payment Technology and Services Company
Summary Of Significant Accounting Policies [Line Items]
Equity method investment, noncontrolling interest	8.00%	4.00%
Common stock Warrants
Summary Of Significant Accounting Policies [Line Items]
Common stock warrants issued, per warrant	$ 26.68
Minimum
Summary Of Significant Accounting Policies [Line Items]
Billed accounts receivable, payment term	30 days
Property and equipment, useful lives	3 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Billed accounts receivable, payment term	60 days
Short-term investment contractual maturities	2 years	2 years
Property and equipment, useful lives	10 years
Cloud and Related Solutions Revenue | Minimum
Summary Of Significant Accounting Policies [Line Items]
Long-term arrangements service period	3 years
Future revenue including variable consideration, contractual terms ending, year	2020
Cloud and Related Solutions Revenue | Maximum
Summary Of Significant Accounting Policies [Line Items]
Long-term arrangements service period	5 years
Future revenue including variable consideration, contractual terms ending, year	2028
Managed Services Solutions | Minimum
Summary Of Significant Accounting Policies [Line Items]
Long-term arrangements service period	3 years
Managed Services Solutions | Maximum
Summary Of Significant Accounting Policies [Line Items]
Long-term arrangements service period	5 years
ASC 606
Summary Of Significant Accounting Policies [Line Items]
Cumulative effect upon adoption of new accounting principle, increase in retained earnings net of tax					$ 7,000
ASU 2016-02
Summary Of Significant Accounting Policies [Line Items]
Operating lease right-of-use assets				$ 80,000
Lease liabilities				$ 80,000