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Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2020
Summary of Significant Accounting Policies  
Schedule of allowances for credit losses, trade accounts receivable and other receivables

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​

​

​

​

​

    

June 30,

​

​

2020

​

​

​

(in thousands)

Beginning balance

​

$

2,919

Cumulative-effect adjustment upon adoption of ASU 2016-13

​

​

403

Provision for credit losses

​

​

1,445

Write-offs

​

​

(457)

Total

​

$

4,310

​

​

​

​

Schedule of Accumulated Other Comprehensive Income (Loss)

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​

​

​

​

​

​

​

​

​

​

​

​

​

Three months ended

​

Six months ended

​

June 30, 

​

June 30, 

​

2020

​

2019

​

2020

​

2019

​

(in thousands)

​

(in thousands)

Beginning balance

$

5,666

​

$

(266)

​

$

920

​

$

(552)

Net unrealized gain on available-for-sale securities, net of tax

​

104

​

​

1,061

​

​

4,850

​

​

1,347

Reclassifications of losses realized from sale of available-for-sale securities

​

—

​

​

—

​

​

—

​

​

—

Increase in other comprehensive loss

​

104

​

​

1,061

​

​

4,850

​

​

1,347

Ending balance

$

5,770

​

$

795

​

$

5,770

​

$

795