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Quarterly Financial Data (Tables)
 12 Months Ended
Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]  
Summary of Quarterly Results
Summarized quarterly results for the years ended December 31, 2019 and 2018 are as follows:

Three months ended 2019 (Unaudited)
 
Year ended (Audited)
 
March 31
 
June 30
 
September 30
 
December 31
 
December 31, 2019

 
 
 
 
 
 
 
 
 
Revenues, net
$
239,573

 
$
243,509

 
$
251,392

 
$
256,872

 
$
991,346

Gross profit(1)
$
82,333

 
$
81,063

 
$
83,850

 
$
88,610

 
$
335,856

Net income
$
14,695

 
$
12,564

 
$
19,044

 
$
21,356

 
$
67,659

Earnings per share:
 
 
 
 
 
 
 
 
 
Basic(2)
$
0.43

 
$
0.36

 
$
0.55

 
$
0.62

 
$
1.97

Diluted(2)
$
0.42

 
$
0.36

 
$
0.55

 
$
0.62

 
$
1.95

Weighted-average number of shares used in computing earnings per share:
 
 
 
 
 
 
 
 
 
Basic(2)
34,374,815

 
34,451,671

 
34,322,449

 
34,253,308

 
34,350,150

Diluted(2)
34,833,435

 
34,702,547

 
34,699,497

 
34,696,896

 
34,732,683


 
 
 
 
 
 
 
 
 
Stock compensation expense
$
6,956

 
$
7,155

 
$
7,427

 
$
4,532

 
$
26,070

Amortization of intangibles
$
5,528

 
$
5,554

 
$
5,502

 
$
4,974

 
$
21,558

 
 
 
 
 
 
 
 
 
 

Three months ended 2018 (Unaudited)
 
Year ended (Audited)
 
March 31
 
June 30
 
September 30
 
December 31
 
December 31, 2018
 
 
 
 
 
 
 
 
 


Revenues, net
$
206,973

 
$
210,112

 
$
231,124

 
$
234,903

 
$
883,112

Gross profit(1)
$
68,872

 
$
70,463

 
$
78,967

 
$
79,955

 
$
298,257

Net income
$
23,158

 
$
14,462

 
$
15,249

 
$
3,857

 
$
56,726

Earnings per share:
 
 
 
 
 
 
 
 
 
Basic(2)
$
0.67

 
$
0.42

 
$
0.44

 
$
0.11

 
$
1.65

Diluted(2)
$
0.66

 
$
0.41

 
$
0.43

 
$
0.11

 
$
1.62

Weighted-average number of shares used in computing earnings per share:
 
 
 
 
 
 
 
 
 
Basic(2)
34,446,265

 
34,511,777

 
34,458,520

 
34,388,025

 
34,451,008

Diluted(2)
35,302,926

 
35,142,388

 
35,207,991

 
34,921,388

 
35,030,984


 
 
 
 
 
 
 
 
 
Stock compensation expense
$
5,074

 
$
6,893

 
$
5,344

 
$
6,590

 
$
23,901

Amortization of intangibles
$
3,947

 
$
3,761

 
$
6,718

 
$
5,951

 
$
20,377



(1) Exclusive of depreciation and amortization expense.

(2) Total of quarterly basic and diluted earnings per share and weighted average number of shares used in computing earnings per share will not be equal to year end basic and diluted earnings per share and weighted average number of shares used in computing earnings per share, respectively.