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Fair Value Measurements of Assets and Liabilities (Tables)
 9 Months Ended
Sep. 30, 2016
Fair Value Measurements of Assets and Liabilities  
Schedule of assets and liabilities held and their related classifications under the fair value hierarchy
The following is a summary of assets, liabilities and redeemable noncontrolling interest and their related classifications under the fair value hierarchy:  
 
September 30, 2016
 
Total
 
(Level 1)
 
(Level 2)
 
(Level 3)
Assets
 
 
 
 
 
 
 
Cash and cash equivalents (A)
$
123,319

 
$
123,319

 
$
—

 
$
—

Securities available-for-sale (B)
20,941

 
—

 
20,941

 
—

Total assets
$
144,260

 
$
123,319

 
$
20,941

 
$
—

Liabilities
 

 
 

 
 

 
 

Contingent consideration obligation
$
8,229

 
$
—

 
$
—

 
$
8,229

Total liabilities
$
8,229


$
—


$
—


$
8,229

Temporary Equity
 

 
 

 
 

 
 

Redeemable noncontrolling interest (C)
$
52,616

 
$
—

 
$
—

 
$
52,616

Total temporary equity
$
52,616


$
—


$
—


$
52,616


 
December 31, 2015
 
Total
 
(Level 1)
 
(Level 2)
 
(Level 3)
Assets
 
 
 
 
 
 
 

Cash and cash equivalents (A)
$
147,634

 
$
147,634

 
$
—

 
$
—

Securities available-for-sale (B)
85,992

 
—

 
85,992

 
—

Total assets
$
233,626

 
$
147,634

 
$
85,992

 
$
—

Liabilities
 

 
 

 
 

 
 

Contingent consideration obligation
$
930

 
$
—

 
$
—

 
$
930

Total liabilities
$
930


$
—


$
—


$
930

Temporary Equity
 

 
 

 
 

 
 

Redeemable noncontrolling interest
$
61,452

 
$
—

 
$
—

 
$
61,452

Total temporary equity
$
61,452


$
—


$
—


$
61,452

(A)
Cash and cash equivalents includes money market funds.
(B)
Securities available-for-sale include municipal bonds, commercial papers, certificates of deposit, enhanced income money market fund and corporate bonds which are classified as marketable securities.
(C)
As of September 30, 2016, the carrying amount of the redeemable noncontrolling interest was greater than the fair value and accordingly no adjustment to the fair value was recorded.
Schedule of estimated fair value of investments classified as available for sale
At September 30, 2016 and December 31, 2015, the estimated fair value of investments classified as available for sale, are as follows: 
 
September 30, 2016
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
Available-for-sale securities:
 
 
 
 
 
 
 
Certificates of deposit
$
450

 
$
1

 
$
—

 
$
451

Corporate bonds
3,032

 
—

 
(31
)
 
3,001

Municipal bonds
17,513

 
1

 
(25
)
 
17,489

Total available-for-sale securities
$
20,995


$
2


$
(56
)

$
20,941

 
 
December 31, 2015
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
Available-for-sale securities:
 
 
 
 
 
 
 
Certificates of deposit
$
2,329

 
$
—

 
$
(5
)
 
$
2,324

Corporate bonds
39,986

 
—

 
(253
)
 
39,733

Municipal bonds
38,564

 
11

 
(44
)
 
38,531

Fixed Income Fund
5,593

 
—

 
(189
)
 
5,404

Total available-for-sale securities
$
86,472


$
11


$
(491
)

$
85,992
Schedule unrealized losses on available for sale securities
The unrealized losses and fair values of available-for-sale securities that have been in an unrealized loss position for a period of less than and greater than 12 months as of September 30, 2016, are as follows: 
 
September 30, 2016
 
Securities in unrealized loss position
less than 12 months
 
Securities in unrealized loss position
greater than 12 months
 
Total
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Gross
Unrealized
Losses
 
Fair
Value
Corporate bonds
$
(31
)
 
$
3,001

 
$
—

 
$
—

 
$
(31
)
 
$
3,001

Municipal bonds
(13
)
 
15,585

 
(1
)
 
689

 
(14
)
 
16,274

 
$
(44
)

$
18,586


$
(1
)

$
689


$
(45
)

$
19,275


The unrealized losses and fair values of available-for-sale securities that have been in an unrealized loss position for a period of less than and greater than 12 months as of December 31, 2015, are as follows: 
 
December 31, 2015
 
Securities in unrealized loss position
less than 12 months
 
Securities in unrealized loss position
greater than 12 months
 
Total
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Gross
Unrealized
Losses
 
Fair
Value
Certificates of deposit
$
(5
)
 
$
2,324

 
—

 
$
—

 
$
(5
)
 
$
2,324

Corporate bonds
(253
)
 
39,808

 
—

 
—

 
(253
)
 
39,808

Municipal bonds
(43
)
 
20,630

 
(1
)
 
550

 
(44
)
 
21,180

Fixed Income Fund
—

 
—

 
(189
)
 
5,404

 
(189
)
 
5,404

 
$
(301
)

$
62,762


$
(190
)

$
5,954


$
(491
)
 
$
68,716
Investments Classified by Contractual Maturity Date [Table Text Block]
Expected maturities of available-for-sale securities are as follows: 
 
September 30, 2016
 
Amortized
Cost
 
Fair
Value
Due within one year
$
17,019

 
$
16,973

Due after 1 year through 5 years
3,976

 
3,968

Total available-for-sale securities
$
20,995

 
$
20,941
Redeemable Noncontrolling Interests  
Fair Value Measurements of Assets and Liabilities  
Schedule of changes in fair value of Level 3
The changes in fair value of the Company’s Level 3 redeemable noncontrolling interests during the nine months ended September 30, 2016 were as follows:
Balance at December 31, 2015
$
61,452

Fair value adjustment
—

Net loss attributable to redeemable noncontrolling interests
(8,836
)
Balance at September 30, 2016
$
52,616
Contingent Consideration Obligation  
Fair Value Measurements of Assets and Liabilities  
Schedule of changes in fair value of Level 3
The changes in fair value of the Company’s Level 3 contingent consideration obligation during the nine months ended September 30, 2016 were as follows: 
Balance at December 31, 2015
$
930

Fair value adjustment to contingent consideration obligation included in net loss
7,299

Balance at September 30, 2016
$
8,229