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Stockholders' Equity (Tables)
 9 Months Ended
Sep. 30, 2018
Equity [Abstract]  
Changes in Accumulated Other Comprehensive Loss by Component The changes in accumulated other comprehensive income (loss) by component, consisted of the following:
 
Three months ended 
 September 30,
 
 
Nine months ended 
 September 30,
 
(dollars in thousands)
2018

2017

 
2018

2017

Accumulated other comprehensive loss, beginning of period
$
(1,011
)
$
(623
)
 
$
(642
)
$
(604
)
By component:
 
 
 
 
 
Gains and losses on cash flow hedges:
 
 
 
 
 
Accumulated other comprehensive income balance, beginning of period
$
2,787

$
203

 
$
776

$
25

Other comprehensive income (loss) before reclassifications, net of tax effects of $(209), $209, $(860) and $135
583

(320
)
 
2,398

(205
)
Amounts reclassified from accumulated other comprehensive loss to interest expense
(23
)
88

 
17

192

Tax benefit included in provision for income taxes
6

(35
)
 
(5
)
(76
)
Total amounts reclassified from accumulated other comprehensive loss
(17
)
53

 
12

116

Net current-period other comprehensive income (loss)
566

(267
)
 
2,410

(89
)
Reclassification upon early adoption of ASU 2018-02
—

—

 
167

—

Accumulated other comprehensive income (loss) balance, end of period
$
3,353

$
(64
)
 
$
3,353

$
(64
)
Foreign currency translation adjustment:
 
 
 
 
 
Accumulated other comprehensive loss balance, beginning of period
$
(3,798
)
$
(826
)
 
$
(1,418
)
$
(629
)
Translation adjustments
1,047

(108
)
 
(1,333
)
(305
)
Accumulated other comprehensive loss balance, end of period
(2,751
)
(934
)
 
(2,751
)
(934
)
Accumulated other comprehensive income (loss), end of period
$
602

$
(998
)
 
$
602

$
(998
)