Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Income from continuing operations	$ 67,396	$ 54,663	$ 50,041
Income from discontinued operations, net of income attributable to the noncontrolling interest	529	2,252	624,346
Net income attributable to common stockholders - basic and diluted	$ 67,925	$ 56,915	$ 674,387
Weighted average shares outstanding (in shares)	5,110,628	5,109,055	5,107,610
Income from continuing operations (in dollars per share)	$ 13.19	$ 10.70	$ 9.80
Income from discontinued operations, net (in dollars per share)	$ 0.10	$ 0.44	$ 122.24
Net income per common share- basic and diluted (in dollars per share)	$ 13.29us-gaap_EarningsPerShareBasicAndDiluted	$ 11.14us-gaap_EarningsPerShareBasicAndDiluted	$ 132.04us-gaap_EarningsPerShareBasicAndDiluted

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

No definition available.

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- Definition

Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

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-Section 50

-Paragraph 1

-Subparagraph (a)

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-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.13)

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The amount of net income (loss) from continuing operations per each basic and diluted share of common stock or unit when the per share amount is the same for both basic and diluted shares.

+ References

No definition available.

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- Definition

Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References

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-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683

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- Definition

Per basic and diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation, when the per share amount is the same.

+ References

No definition available.

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- Definition

Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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- Definition

Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

+ References

No definition available.

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