Debt - Narrative (Details) - USD ($) | Jul. 23, 2020 | Apr. 16, 2020 | Mar. 05, 2020 | Nov. 27, 2019 | Aug. 23, 2012 | Jun. 27, 2012 | Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Aug. 28, 2020 | Aug. 12, 2020 | Jul. 10, 2020 | Jul. 09, 2020 | Mar. 31, 2018 | Dec. 30, 2014 | Apr. 30, 2013 |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Loss on extinguishment of debt | | | | | | | $ 16,000,000 | $ 16,565,000 | $ 7,188,000 | $ 0 | | | | | | | |
Construction loan | | | | | | | | | | | | | | | $ 34,900,000 | | |
2012 Special Cash Dividend | 2012 Special Cash Dividend | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Payments of special dividends | | | | | $ 600,700,000 | | | | | | | | | | | | |
Construction Loan | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Loss on extinguishment of debt | | | $ 600,000 | | | | | | | | | | | | | | |
Debt instrument effective interest rate | | | | | | | | | 6.23% | | | | | | | | |
Repayments of debt | | | $ 33,100,000 | | | | | | | | | | | | | | |
Collateralized Mortgage | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument stated interest rate | | | | | | | | | | | | | | | | 7.26% | |
Debt instrument effective interest rate | | | | | | | | | 4.57% | | | | | | | | |
Mortgage obligation | | | | | | | | | | | | | | | | $ 9,500,000 | |
Debt instrument, future balloon payment | | | | | | | | | | | | | | | | 6,900,000 | |
Debt instrument, unamortized premium | | | | | | | | | | | | | | | | $ 1,200,000 | |
Economic Development Loans | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument stated interest rate | | | | | | | | 3.00% | | | | | | | | | |
Debt instrument effective interest rate | | | | | | | | 3.00% | 3.00% | | | | | | | | |
Economic development agreements - total advances agreed upon | | | | | | | | | | | | | | | | | $ 4,400,000 |
Economic development agreements - term | | | | | | | | 10 years | | | | | | | | | |
$600 million senior unsecured credit facility with an effective interest rate of 2.76%, less deferred issuance costs of $2.7 million at December 31, 2019(1) | Revolving Credit Facilities | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Line of credit maximum borrowing capacity | | | | | | | | $ 600,000,000 | | | | | | | | | |
Debt instrument, extension, term | | | | | | | | 1 year | | | | | | | | | |
Debt instrument additional borrowing capacity | | | | | | | | $ 250,000,000 | | | | | | | | | |
Total leverage ratio | | | | | | | | 2.5 | | | | | | | | | |
$600 million senior unsecured credit facility with an effective interest rate of 2.76%, less deferred issuance costs of $2.7 million at December 31, 2019(1) | Revolving Credit Facilities | Minimum | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Credit facility, commitment fee percentage | | | | | | | | 0.075% | | | | | | | | | |
Fixed charge coverage ratio (not less than) | | | | | | | | 2.5 | | | | | | | | | |
$600 million senior unsecured credit facility with an effective interest rate of 2.76%, less deferred issuance costs of $2.7 million at December 31, 2019(1) | Revolving Credit Facilities | Maximum | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Total leverage ratio | | | | | | | | 4.5 | | | | | | | | | |
Credit facility, commitment fee percentage | | | | | | | | 0.25% | | | | | | | | | |
$600 million senior unsecured credit facility with an effective interest rate of 2.76%, less deferred issuance costs of $2.7 million at December 31, 2019(1) | Revolving Credit Facilities | London Interbank Offered Rate (LIBOR) | Minimum | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, basis spread on variable rate | | | | | | | | 0.90% | | | | | | | | | |
$600 million senior unsecured credit facility with an effective interest rate of 2.76%, less deferred issuance costs of $2.7 million at December 31, 2019(1) | Revolving Credit Facilities | London Interbank Offered Rate (LIBOR) | Maximum | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, basis spread on variable rate | | | | | | | | 1.50% | | | | | | | | | |
$600 million senior unsecured credit facility with an effective interest rate of 2.76%, less deferred issuance costs of $2.7 million at December 31, 2019(1) | Revolving Credit Facilities | Base Rate | Minimum | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, basis spread on variable rate | | | | | | | | 0.00% | | | | | | | | | |
$600 million senior unsecured credit facility with an effective interest rate of 2.76%, less deferred issuance costs of $2.7 million at December 31, 2019(1) | Revolving Credit Facilities | Base Rate | Maximum | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, basis spread on variable rate | | | | | | | | 0.50% | | | | | | | | | |
$600 million senior unsecured credit facility with an effective interest rate of 2.76%, less deferred issuance costs of $2.7 million at December 31, 2019(1) | Revolving Credit Facilities | Total Leverage Ratio exceeds 5.50 to 1.00 | Maximum | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Total leverage ratio | | | | | | | | 5.5 | | | | | | | | | |
$600 million senior unsecured credit facility with an effective interest rate of 2.76%, less deferred issuance costs of $2.7 million at December 31, 2019(1) | Revolving Credit Facilities | Alternative Currency Loans | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Line of credit maximum borrowing capacity | | | | | | | | $ 35,000,000 | | | | | | | | | |
$600 million senior unsecured credit facility with an effective interest rate of 2.76%, less deferred issuance costs of $2.7 million at December 31, 2019(1) | Revolving Credit Facilities | Swingline Loans | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Line of credit maximum borrowing capacity | | | | | | | | $ 25,000,000 | | | | | | | | | |
$600 million senior unsecured credit facility with an effective interest rate of 2.76%, less deferred issuance costs of $2.7 million at December 31, 2019(1) | Senior | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, face amount | | | | | | | | | $ 600,000,000 | | | | | | | | |
Debt instrument effective interest rate | | | | | | | | | 2.76% | | | | | | | | |
525 Million Unsecured Credit Facility Due 2025 | Revolving Credit Facilities | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, extension, term | | | | | | | | 1 year | | | | | | | | | |
525 Million Unsecured Credit Facility Due 2025 | Senior | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Line of credit maximum borrowing capacity | | | | | | | | | | | | $ 525,000,000 | | | | | |
Debt instrument, fee amount | | | | | | | | | | | | $ 300,000 | | | | | |
$250 Million Unsecured Term Loan | Unsecured Debt | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, extension, term | | 1 year | | | | | | | | | | | | | | | |
Debt instrument, face amount | | $ 250,000,000 | | | | | | | | | | | | | | | |
Total leverage ratio | | 4 | | | | | | | | | | | | | | | |
Debt instrument, principal repayments, percentage of cash proceeds | | 100.00% | | | | | | | | | | | | | | | |
Cash and cash equivalents | | $ 250,000,000 | | | | | | | | | | | | | | | |
$250 Million Unsecured Term Loan | Unsecured Debt | Minimum | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Fixed charge coverage ratio (not less than) | | 2.5 | | | | | | | | | | | | | | | |
$250 Million Unsecured Term Loan | Unsecured Debt | Maximum | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Fixed charge coverage ratio (not less than) | | 4.5 | | | | | | | | | | | | | | | |
$250 Million Unsecured Term Loan | Unsecured Debt | London Interbank Offered Rate (LIBOR) | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, basis spread on variable rate | | 1.00% | | | | | | | | | | | | | | | |
$250 Million Unsecured Term Loan | Unsecured Debt | London Interbank Offered Rate (LIBOR) | Minimum | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, basis spread on variable rate | | 2.00% | | | | | | | | | | | | | | | |
$250 Million Unsecured Term Loan | Unsecured Debt | London Interbank Offered Rate (LIBOR) | Maximum | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, basis spread on variable rate | | 2.75% | | | | | | | | | | | | | | | |
$250 Million Unsecured Term Loan | Unsecured Debt | Base Rate | Minimum | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, basis spread on variable rate | | 1.00% | | | | | | | | | | | | | | | |
$250 Million Unsecured Term Loan | Unsecured Debt | Base Rate | Maximum | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, basis spread on variable rate | | 1.75% | | | | | | | | | | | | | | | |
$450 million senior unsecured notes due 2031 with an effective interest rate of 3.86%, less a discount and deferred issuance costs of $6.1 million at December 31, 2020 | Senior | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, face amount | $ 450,000,000 | | | | | | | $ 450,000,000 | | | | | | | | | |
Debt instrument stated interest rate | 3.70% | | | | | | | | | | | | | | | | |
Debt instrument effective interest rate | | | | | | | | 3.86% | | | | | | | | | |
$450 million senior unsecured notes due 2031 with an effective interest rate of 3.86%, less a discount and deferred issuance costs of $6.1 million at December 31, 2020 | Senior | Prior to October 15, 2030 | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, percentage of principal amount to be redeemed | 100.00% | | | | | | | | | | | | | | | | |
$450 million senior unsecured notes due 2031 with an effective interest rate of 3.86%, less a discount and deferred issuance costs of $6.1 million at December 31, 2020 | Senior | Par Call date | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, percentage of principal amount to be redeemed | 100.00% | | | | | | | | | | | | | | | | |
$450 million senior unsecured notes due 2031 with an effective interest rate of 3.86%, less a discount and deferred issuance costs of $6.1 million at December 31, 2020 | Senior | Change of control event | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, percentage of principal amount to be redeemed | 101.00% | | | | | | | | | | | | | | | | |
$450 million senior unsecured notes due 2031 with an effective interest rate of 3.86%, less a discount and deferred issuance costs of $6.1 million at December 31, 2020 | Senior | Treasury Rate | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, basis spread on variable rate | 0.50% | | | | | | | | | | | | | | | | |
$400 million senior unsecured notes due 2029 with an effective interest rate of 3.88%, less a discount and deferred issuance costs of $5.4 million and $6.0 million at December 31, 2020 and December 31, 2019, respectively | Senior | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, face amount | | | | $ 400,000,000 | | | | $ 400,000,000 | $ 400,000,000 | | | | | | | | |
Debt instrument stated interest rate | | | | 3.70% | | | | | | | | | | | | | |
Senior notes, discount | | | | $ 2,400,000 | | | | | | | | | | | | | |
Debt instrument effective interest rate | | | | 3.88% | | | | 3.88% | 3.88% | | | | | | | | |
$400 million senior unsecured notes due 2029 with an effective interest rate of 3.88%, less a discount and deferred issuance costs of $5.4 million and $6.0 million at December 31, 2020 and December 31, 2019, respectively | Senior | Change of control event | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, percentage of principal amount to be redeemed | 101.00% | | | | | | | | | | | | | | | | |
$400 million senior unsecured notes due 2029 with an effective interest rate of 3.88%, less a discount and deferred issuance costs of $5.4 million and $6.0 million at December 31, 2020 and December 31, 2019, respectively | Senior | Treasury Rate | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, basis spread on variable rate | 0.30% | | | | | | | | | | | | | | | | |
$400 million senior unsecured notes due 2029 with an effective interest rate of 3.88%, less a discount and deferred issuance costs of $5.4 million and $6.0 million at December 31, 2020 and December 31, 2019, respectively | Senior | Debt Instrument Redemption | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, percentage of principal amount to be redeemed | | | | 100.00% | | | | | | | | | | | | | |
$250 Million Senior Notes | Senior | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, face amount | | | | | | | | | | | $ 250,000,000 | | | | | | |
$400 million senior unsecured notes due 2022 with an effective interest rate of 6.0% less deferred issuance costs of $0.7 million and $2.3 million at December 31, 2020 and December 31, 2019, respectively | Senior | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, face amount | | | | | | $ 400,000,000 | | $ 400,000,000 | $ 400,000,000 | | | | | | | | |
Debt instrument stated interest rate | | | | | | 5.75% | | | | | | | | | | | |
Debt instrument effective interest rate | | | | | | 6.00% | | 6.00% | 6.00% | | | | | | | | |
Debt instrument, repurchased face amount | $ 183,400,000 | | | | | | | | | | | | $ 180,000,000 | $ 160,000,000 | | | |
Debt instrument, repurchase amount | $ 197,800,000 | | | | | | | | | | | | | | | | |
Mortgage obligation | | | | | | | | $ 216,600,000 | | | | | | | | | |
$400 million senior unsecured notes due 2022 with an effective interest rate of 6.0% less deferred issuance costs of $0.7 million and $2.3 million at December 31, 2020 and December 31, 2019, respectively | Senior | Change of control event | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, percentage of principal amount to be redeemed | 101.00% | | | | | | | | | | | | | | | | |
$400 million senior unsecured notes due 2022 with an effective interest rate of 6.0% less deferred issuance costs of $0.7 million and $2.3 million at December 31, 2020 and December 31, 2019, respectively | Senior | Treasury Rate | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, basis spread on variable rate | | | | | | 0.50% | | | | | | | | | | | |
$400 million senior unsecured notes due 2022 with an effective interest rate of 6.0% less deferred issuance costs of $0.7 million and $2.3 million at December 31, 2020 and December 31, 2019, respectively | Senior | Debt Instrument Redemption | | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | | |
Debt instrument, percentage of principal amount to be redeemed | | | | | | 100.00% | | | | | | | | | | | |