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Fair Value Disclosures (Measured on a Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Interest Rate Derivative Instruments, Hedging and Not Designated as Hedging Instruments, Liability at Fair Value	$ 961	$ 1,064
Interest rate swaps
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Liabilities measured on a recurring basis, fair value	961	1,064
Interest rate swaps | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Liabilities measured on a recurring basis, fair value	0	0
Interest rate swaps | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Liabilities measured on a recurring basis, fair value		1,064
Interest rate swaps | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Liabilities measured on a recurring basis, fair value	0	0
Interest rate swaps
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	1,511	942
Interest rate swaps | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	0	0
Interest rate swaps | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	1,511	942
Interest rate swaps | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	0	0
U.S. government agency obligations - government-sponsored enterprises
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	990	1,000
U.S. government agency obligations - government-sponsored enterprises | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	0	0
U.S. government agency obligations - government-sponsored enterprises | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	990	1,000
U.S. government agency obligations - government-sponsored enterprises | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	0	0
Municipal obligations
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	8,181	9,414
Municipal obligations | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	0	0
Municipal obligations | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	8,181	9,414
Municipal obligations | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	0	0
Asset-backed securities
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value		0
Asset-backed securities | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value		0
Asset-backed securities | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value		0
Asset-backed securities | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value		0
Collateralized mortgage obligations - government issued
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	22,845	22,249
Collateralized mortgage obligations - government issued | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	0	0
Collateralized mortgage obligations - government issued | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	22,845	22,249
Collateralized mortgage obligations - government issued | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	0	0
Collateralized mortgage obligations - government-sponsored enterprises
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	93,284	90,305
Collateralized mortgage obligations - government-sponsored enterprises | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	0	0
Collateralized mortgage obligations - government-sponsored enterprises | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	93,284	90,305
Collateralized mortgage obligations - government-sponsored enterprises | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	0	0
Other securities
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	2,661	3,037
Other securities | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	0	0
Other securities | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	2,661	3,037
Other securities | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on a Recurring Basis
Assets measured on a recurring basis, fair value	$ 0	$ 0

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