Fair Value Measurements and Fair Value of Financial Instruments (Details) - Schedule of Fair Value on a non-recurring basis - Impaired Loans [Member] - Non-recurring [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Commercial Real Estate [Member]
Fair Value Measurements and Fair Value of Financial Instruments (Details) - Fair value, assets and liabilities measured on nonrecurring basis, valuation techniques [Line Items]
Assets measured at fair value	$ 1,092	$ 1,094
Commercial Real Estate [Member] | Appraisals of collateral value [Member]
Fair Value Measurements and Fair Value of Financial Instruments (Details) - Fair value, assets and liabilities measured on nonrecurring basis, valuation techniques [Line Items]
Capitalization rate	5.00%	15.00%
Commercial Real Estate [Member] | Appraisals of collateral value [Member] | Minimum [Member]
Fair Value Measurements and Fair Value of Financial Instruments (Details) - Fair value, assets and liabilities measured on nonrecurring basis, valuation techniques [Line Items]
Capitalization rate	0.00%	12.00%
Commercial Real Estate [Member] | Appraisals of collateral value [Member] | Maximum [Member]
Fair Value Measurements and Fair Value of Financial Instruments (Details) - Fair value, assets and liabilities measured on nonrecurring basis, valuation techniques [Line Items]
Capitalization rate	10.00%	17.00%
Commercial Construction Portfolio Segment [Member]
Fair Value Measurements and Fair Value of Financial Instruments (Details) - Fair value, assets and liabilities measured on nonrecurring basis, valuation techniques [Line Items]
Assets measured at fair value	$ 2,554
Commercial Construction Portfolio Segment [Member] | Appraisals of collateral value [Member]
Fair Value Measurements and Fair Value of Financial Instruments (Details) - Fair value, assets and liabilities measured on nonrecurring basis, valuation techniques [Line Items]
Capitalization rate	5.00%
Commercial Construction Portfolio Segment [Member] | Appraisals of collateral value [Member] | Minimum [Member]
Fair Value Measurements and Fair Value of Financial Instruments (Details) - Fair value, assets and liabilities measured on nonrecurring basis, valuation techniques [Line Items]
Capitalization rate	0.00%
Commercial Construction Portfolio Segment [Member] | Appraisals of collateral value [Member] | Maximum [Member]
Fair Value Measurements and Fair Value of Financial Instruments (Details) - Fair value, assets and liabilities measured on nonrecurring basis, valuation techniques [Line Items]
Capitalization rate	10.00%
Commercial taxi medallion loans [Member]
Fair Value Measurements and Fair Value of Financial Instruments (Details) - Fair value, assets and liabilities measured on nonrecurring basis, valuation techniques [Line Items]
Assets measured at fair value	$ 29,405
Discount Range	7.00%
Commercial taxi medallion loans [Member] | Appraisals of collateral value [Member]
Fair Value Measurements and Fair Value of Financial Instruments (Details) - Fair value, assets and liabilities measured on nonrecurring basis, valuation techniques [Line Items]
Capitalization rate	38.00%
Commercial taxi medallion loans [Member] | Appraisals of collateral value [Member] | Minimum [Member]
Fair Value Measurements and Fair Value of Financial Instruments (Details) - Fair value, assets and liabilities measured on nonrecurring basis, valuation techniques [Line Items]
Capitalization rate	26.00%
Commercial taxi medallion loans [Member] | Appraisals of collateral value [Member] | Maximum [Member]
Fair Value Measurements and Fair Value of Financial Instruments (Details) - Fair value, assets and liabilities measured on nonrecurring basis, valuation techniques [Line Items]
Capitalization rate	99.00%