Long-Term Debt (Break-Down Of Long-Term Debt) (Details) - USD ($) |
Sep. 30, 2015 |
Sep. 18, 2015 |
Dec. 31, 2014 |
Mar. 31, 2011 |
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Debt Instrument [Line Items] | |||||||||||||||||||
Long-term debt | $ 10,000,000.0 | ||||||||||||||||||
Unamortized original issue (discount) premium, net (5) | [1] | $ 13,048,000 | $ 14,658,000 | ||||||||||||||||
Less: current maturities of long term debt | (1,695,000) | (168,000) | |||||||||||||||||
Long-term debt, net of current maturities | 963,048,000 | 716,316,000 | |||||||||||||||||
Line of Credit [Member] | |||||||||||||||||||
Debt Instrument [Line Items] | |||||||||||||||||||
Long-term debt | [2] | 0 | 100,000,000 | ||||||||||||||||
Building loans [Member] | |||||||||||||||||||
Debt Instrument [Line Items] | |||||||||||||||||||
Long-term debt | 1,695,000 | [3] | 1,826,000 | [3] | $ 2,400,000 | ||||||||||||||
7.75% Senior Notes [Member] | |||||||||||||||||||
Debt Instrument [Line Items] | |||||||||||||||||||
Long-term debt | [4] | 600,000,000 | 600,000,000 | ||||||||||||||||
6.625% Senior Notes [Member] | |||||||||||||||||||
Debt Instrument [Line Items] | |||||||||||||||||||
Long-term debt | [5] | 350,000,000 | 0 | ||||||||||||||||
Construction Loans [Member] | |||||||||||||||||||
Debt Instrument [Line Items] | |||||||||||||||||||
Long-term debt | [6] | $ 0 | $ 0 | ||||||||||||||||
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