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Equity Method Investments (Tables)
 3 Months Ended
Mar. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]  
Summary of Information Related to the Company's Equity Method Investments
Activity related to these equity method investments is as follows:
 
 
Constitution
 
Meade
 
Total
 
 
Three Months Ended March 31,
 
Three Months Ended March 31,
 
Three Months Ended March 31,
(In thousands)
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
Balance at beginning of period
 
$
96,850

 
$
90,345

 
$
32,674

 
$
13,172

 
$
129,524

 
$
103,517

Contributions
 
1,125

 
6,250

 
6,617

 
5,402

 
7,742

 
11,652

Earnings (loss) on equity method investments
 
(1,282
)
 
2,011

 
(1
)
 
(2
)
 
(1,283
)
 
2,009

Balance at end of period
 
$
96,693

 
$
98,606

 
$
39,290

 
$
18,572

 
$
135,983

 
$
117,178