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12. Stockholders' Equity (Details)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dividend Yield 2.97%us-gaap_FairValueAssumptionsExpectedDividendRate  
Volatility 40.53%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate  
Risk-Free Interest Rate 0.92%us-gaap_FairValueAssumptionsRiskFreeInterestRate  
Expected Life 3 years 3 months 3 years 3 months
Minimum [Member]    
Dividend Yield   2.42%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Volatility   45.73%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Risk-Free Interest Rate   0.61%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum [Member]    
Dividend Yield   3.14%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Volatility   46.71%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Risk-Free Interest Rate   0.79%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember