Long-Term Debt - Debt Maturities Table (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Debt maturities, within 1 year	$ 12,617
Debt maturities, year 1 through year 2	8,145
Debt maturities, year 2 through year 3	10,176
Debt maturities, year 3 through year 4	149,613
Debt maturities, year 4 through year 5	17,221
Debt maturities, thereafter	1,035,954
Total long-term debt	1,233,726	$ 1,295,761
Corporate-level debt
Debt Instrument [Line Items]
Debt maturities, within 1 year	0
Debt maturities, year 1 through year 2	0
Debt maturities, year 2 through year 3	0
Debt maturities, year 3 through year 4	135,000
Debt maturities, year 4 through year 5	0
Debt maturities, thereafter	752,445
Total long-term debt	887,445
Permanent financing
Debt Instrument [Line Items]
Debt maturities, within 1 year	12,617
Debt maturities, year 1 through year 2	8,145
Debt maturities, year 2 through year 3	10,176
Debt maturities, year 3 through year 4	14,613
Debt maturities, year 4 through year 5	17,221
Debt maturities, thereafter	283,509
Total long-term debt	$ 346,281

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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