Earnings Per Common Share (Calculations of Basic and Diluted Earnings per Common Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Earnings Per Share [Abstract]
Distributed earnings allocated to common stock	$ 1,275	$ 1,165
Undistributed earnings allocated to common stock	3,702	5,458
Net earnings allocated to common shareholders	$ 4,977	$ 6,623
Weighted-average number of common shares outstanding - basic	10,556,261	10,513,388	10,513,388
Effect of postentially dilutive common shares	15,122	0
Weighted-average number of common shares outstanding - diluted	10,571,383	10,513,388	10,513,388
Earnings per common share - basic	$ 0.47	$ 0.63	$ 0.63
Earnings per common share - diluted	$ 0.47	$ 0.63	$ 0.63
Restricted Shares, Stock Options and SARs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from computation of EPS	116,566		188,212

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The total amount of dividends declared in the period for each class of stock and the contractual amount of dividends (or interest on participating income bonds) that must be paid for the period (for example, unpaid cumulative dividends). Dividends declared in the current period do not include dividends declared in respect of prior-period unpaid cumulative dividends. Preferred dividends that are cumulative only if earned are deducted only to the extent that they are earned.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (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.

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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.

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