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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2017
Summary of Significant Accounting Policies  
Schedule of cash paid

Cash paid (in thousands) for:

 

 

 

 

 

 

 

 

 

 

 

 

 

Year Ended December 31,

 

 

    

2017

    

2016

    

2015

 

Interest

 

$

2,832

 

$

1,864

 

$

1,408

 

Income taxes

 

$

38,144

 

$

29,349

 

$

35,538

 

 

Schedule of contracts in progress

Contracts in progress are as follows (in thousands):

 

 

 

 

 

 

 

 

 

 

December 31,

 

 

    

2017

    

2016

 

Costs incurred on contracts in progress

 

$

1,288,330

 

$

1,116,182

 

Estimated earnings, net of losses

 

 

253,641

 

 

207,252

 

Less—Billings to date

 

 

(1,617,860)

 

 

(1,378,050)

 

 

 

$

(75,889)

 

$

(54,616)

 

Costs and estimated earnings in excess of billings

 

$

30,116

 

$

29,369

 

Billings in excess of costs and estimated earnings

 

 

(106,005)

 

 

(83,985)

 

 

 

$

(75,889)

 

$

(54,616)