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Long-Lived Assets (Tables)
 12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment [Abstract]  
Summary of Depreciation, Amortization and Accretion
The consolidated balances consisted of the following for the periods stated:
 
 
For the Year Ended December 31,
 
2013
 
2012
 
2011
 
(Dollars in thousands)
Depreciation
$
9,664

 
$
11,054

 
$
13,253

Amortization
4,965

 
6,411

 
5,274

Accretion(1)
538

 
767

 
807

Total depreciation, amortization and accretion
$
15,167

 
$
18,232

 
$
19,334

 
(1) 
Accretion expense included $(29,000) in 2013 and $29,000 in 2012 in software operations related to the IMCO acquisition.
Summary of Changes in Asset Retirement Obligation Liability Balances
The components of the changes in the asset retirement obligation liabilities for the periods stated were as follows:
 
 
Short-Term
Portion
 
Long-Term
Portion
 
Total
 
(Dollars in thousands)
Balance at January 1, 2012
$
794

 
$
7,557

 
$
8,351

Accretion
62

 
676

 
738

Amounts paid
(767
)
 
—

 
(767
)
Reductions recorded
(35
)
 
(351
)
 
(386
)
Reclassifications
325

 
(325
)
 
—

Balance at December 31, 2012
$
379

 
$
7,557

 
$
7,936

Accretion
(112
)
 
679

 
567

Amounts paid
(415
)
 
—

 
(415
)
Reductions recorded
(445
)
 
314

 
(131
)
Reclassifications
951

 
(951
)
 
—

Balance at December 31, 2013
$
358

 
$
7,599

 
$
7,957
Schedule of Accretion Discount Rates on Interest Method
The accretion was recorded on the interest method utilizing the following discount rates for the specified periods:
 
 
 
Period
Discount Rate
2013 – December 31 Additions(1) and Incremental Estimates
10.48
%
2013 – January 1 through September 30 – Additions(1)
10.60
%
2012 – December 31 Additions(1) and Incremental Estimates
10.60
%
2012 – September 30 – Incremental Estimates(2)
12.14
%
2012 – January 1 through September 30 – Additions(1)
10.77
%
2011 – December 31 Additions(1) and Incremental Estimates
10.77
%
2011 – September 30 – Incremental Estimates(2)
12.17
%
2011 – April 1 through September 30 – Additions(1)
11.50
%
2011 – January 1 through March 31 – Additions(1)
12.46
%
 
(1) 
Transmitters moved to new sites resulting in additional liability.
(2) 
Weighted average credit adjusted risk-free rate used to discount downward revision to estimated future cash flows.
Summary of Amortizable Intangible Assets
The net consolidated balance of amortizable intangible assets consisted of the following at December 31, 2013 and 2012:
 
 
 
 
As of December 31,
 
 
 
2013
 
2012
 
Useful Life
(In Years)
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Balance
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Balance
 
 
 
(Dollars in thousands)
Customer relationships
10
 
$
25,002

 
$
(7,084
)
 
$
17,918

 
$
25,002

 
$
(4,584
)
 
$
20,418

Acquired technology
2 - 4
 
8,452

 
(5,865
)
 
2,587

 
8,452

 
(3,911
)
 
4,541

Non-compete agreements
3 - 5
 
2,370

 
(2,132
)
 
238

 
2,800

 
(2,431
)
 
369

Trademarks
15
 
5,702

 
(1,077
)
 
4,625

 
5,702

 
(697
)
 
5,005

Total amortizable intangible assets
 
 
$
41,526

 
$
(16,158
)
 
$
25,368

 
$
41,956

 
$
(11,623
)
 
$
30,333
Summary of Estimated Amortization of Intangible Assets for Future Periods
Estimated amortization of intangible assets for future periods was as follows:
 
 
 
 
(Dollars in
thousands)
For the year ending December 31,
 
2014
$
4,866

2015
3,588

2016
3,013

2017
2,880

2018
2,880

Thereafter
8,141

Total
$
25,368