Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net Earnings	$ 78,233us-gaap_NetIncomeLoss	$ 120,666us-gaap_NetIncomeLoss	$ 173,043us-gaap_NetIncomeLoss
Other Comprehensive (Loss) Income:
Foreign Currency Translation Adjustment	(26)	5	(343)
Less: Reclassification Adjustments for Net Gains Included in Net Earnings	0	0	373
Total Other Comprehensive (Loss) Income	(26)	5	30
Comprehensive Income	$ 78,207us-gaap_ComprehensiveIncomeNetOfTax	$ 120,671us-gaap_ComprehensiveIncomeNetOfTax	$ 173,073us-gaap_ComprehensiveIncomeNetOfTax

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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- Definition

Amount after tax of reclassification adjustment from accumulated other comprehensive income for translation gain (loss) realized upon the sale or liquidation of an investment in a foreign entity and foreign currency hedges that are designated and qualified as hedging instruments for hedges of the foreign currency exposure of a net investment in a foreign operation.

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