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Long-Term Debt (Tables)
 6 Months Ended
Jun. 30, 2014
Debt Instrument [Line Items]  
Summary of long-term debt
The Company carries its long-term debt at face value, net of applicable discounts. Long-term debt consisted of the following:
 
 
June 30, 2014
 
December 31, 2013
 
 
(dollars in thousands)
2.25% Convertible Senior Notes
 
$
164,556

 
$
160,334

3.00% Convertible Senior Notes
 
16,907

 
84,305

Real Estate Credit Facility
 
66,316

 
67,719

5.00% Senior Notes
 
344,796

 
—

Acquisition Line
 
20,457

 
60,000

Other Real Estate Related and Long-Term Debt
 
307,738

 
279,167

Capital lease obligations related to real estate, maturing in varying amounts through June 2034 with a weighted average interest rate of 10.6%
 
48,321

 
47,553

 
 
969,091

 
699,078

Less current maturities of real estate credit facility and other long-term debt
 
30,516

 
35,389

 
 
$
938,575

 
$
663,689
2.25% Convertible Notes [Member]
  
Debt Instrument [Line Items]  
Summary of long-term debt
As of June 30, 2014 and December 31, 2013, the carrying value of the Company's 2.25% Convertible Senior Notes due 2036 (“2.25% Notes”), related discount and equity component consisted of the following:
 
 
June 30, 2014
 
December 31, 2013
 
 
(In thousands)
Carrying amount of equity component (including temporary equity)
 
$
65,270

 
$
65,270

Allocated underwriter fees, net of taxes
 
(1,475
)
 
(1,475
)
Allocated debt issuance cost, net of taxes
 
(58
)
 
(58
)
Total net equity component
 
$
63,737

 
$
63,737

Deferred income tax component
 
$
6,524

 
$
8,023

Principal amount of 2.25% Notes
 
$
182,753

 
$
182,753

Unamortized discount
 
(17,511
)
 
(21,574
)
Unamortized underwriter fees
 
(686
)
 
(845
)
Net carrying amount of liability component
 
$
164,556

 
$
160,334

Unamortized debt issuance cost
 
$
27

 
$
33
Contractual interest expense and the discount amortization
For the six months ended June 30, 2014 and 2013, the contractual interest expense and the discount amortization, which is recorded as other interest expense in the accompanying Consolidated Statements of Operations, were as follows: 
 
 
Six Months Ended June 30,
 
 
2014
 
2013
 
 
(dollars in thousands)
Year-to-date contractual interest expense
 
$
2,056

 
$
2,056

Year-to-date discount amortization (1)
 
$
3,998

 
$
3,689

Effective interest rate of liability component
 
7.7
%
 
7.7
%
 
(1)    Represents the incremental impact of the accounting for convertible debt as primarily codified in ASC 470, Debt.
3.00% Convertible Notes [Member]
  
Debt Instrument [Line Items]  
Summary of long-term debt
As of June 30, 2014 and December 31, 2013, the carrying value of the 3.00% Notes, related discount and equity component consisted of the following
 
 
June 30, 2014
 
December 31, 2013
 
 
(In thousands)
Carrying amount of equity component (including temporary equity)
 
$
4,973

 
$
25,359

Allocated underwriter fees, net of taxes
 
(149
)
 
(760
)
Allocated debt issuance cost, net of taxes
 
(22
)
 
(112
)
Total net equity component
 
$
4,802

 
$
24,487

Deferred income tax component
 
$
1,936

 
$
10,625

Principal amount of 3.00% Notes
 
$
22,550

 
$
115,000

Unamortized discount
 
(5,348
)
 
(29,094
)
Unamortized underwriter fees
 
(295
)
 
(1,601
)
Net carrying amount of liability component
 
$
16,907

 
$
84,305

Unamortized debt issuance costs
 
$
44

 
$
236
Contractual interest expense and the discount amortization
For the six months ended June 30, 2014 and 2013, the contractual interest expense and the discount amortization, which is recorded as interest expense in the accompanying Consolidated Statements of Operations, were as follows:
 
 
Six Months Ended June 30,
 
 
2014
 
2013
 
 
(dollars in thousands)
Year-to-date contractual interest expense
 
$
1,679

 
$
1,725

Year-to-date discount amortization (1) 
 
$
1,693

 
$
1,588

Effective interest rate of liability component
 
8.6
%
 
8.6
%
(1)    Represents the incremental impact of the accounting for convertible debt as primarily codified in ASC 470, Debt.