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STOCKHOLDERS' EQUITY (Tables)
 12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
Summary of Dividends Declared and Dividend Payments
(in thousands)
2018
 
2017
 
2016
Dividend payments to shareholders
$
9,432

 
$
9,277

 
$
9,174

 (per share)
2018
 
2017
 
2016
Dividends Declared
$
0.12

 
$
0.12

 
$
0.12
Summary of Repurchase Activity under Repurchase Programs
(in thousands)
2018
 
2017
 
2016
Shares
 
Amount
 
Shares
 
Amount
 
Shares
 
Amount
Authorization remaining, beginning of period
 
 
$
34,892

 
 
 
$
39,385

 
 
 
$
40,534

Authorizations
 
 
$
27,003

 
 
 
$
—

 
 
 
$
25,879

Repurchases paid
980

 
$
(54,276
)
 
96

 
$
(4,335
)
 
1,078

 
$
(27,028
)
Repurchases unsettled
21

 
$
(999
)
 
3

 
$
(158
)
 
—

 
$
—

Authorization remaining, end of period
 
 
$
6,620

 
 
 
$
34,892

 
 
 
$
39,385