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Income Taxes - Reconciliation of effective tax rate (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of effective tax rate
Statutory tax rate (benefit)	35.00%	35.00%	35.00%
State taxes (benefit)-net of federal tax effect	6.00%	6.00%	6.00%
CRA investment tax credit	(2.00%)	(2.00%)	(3.00%)
Other	0.00%	1.00%	(1.00%)
Effective income tax rate, percent	39.00%	40.00%	37.00%

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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