Fair Values of Financial Instruments (Estimated Fair Values of Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assets, carrying amount
Cash and cash equivalents	$ 22,122	$ 25,285	$ 34,396	$ 25,285	$ 32,778
FHLB stock, carrying amount	14,391	14,391
Interest receivable, carrying amount	3,570	3,775
Loans held for sale, carrying amount	1,542	1,888
Loans net, carrying amount	964,479	965,966
Liabilities, carrying amount
Deposits, carrying amount	1,104,961	1,113,084
FHLB advances, carrying amount	144,128	142,928
Other borrowings, carrying amount	10,711	10,890
Interest payable, carrying amount	201	157
Assets
Cash and cash equivalents	22,122	25,285
FHLB stock, fair value	14,391	14,391
Interest receivable, fair value	3,570	3,775
Loans held for sale, fair value	1,579	1,905
Loans, fair value	939,868	935,414
Liabilities, fair value
Deposits, fair value	1,064,483	1,068,422
FHLB advances, fair value	143,147	141,526
Other borrowings, fair value	10,711	10,890
Interest payable, fair value	201	157
Fair Value, Inputs, Level 1 [Member]
Assets
Cash and cash equivalents	22,122	25,285
Liabilities, fair value
Deposits, fair value	609,342	593,457
Fair Value, Inputs, Level 2 [Member]
Assets
FHLB stock, fair value	14,391	14,391
Interest receivable, fair value	3,570	3,775
Loans held for sale, fair value	1,579	1,905
Liabilities, fair value
FHLB advances, fair value	143,147	141,526
Other borrowings, fair value	10,711	10,890
Interest payable, fair value	201	157
Fair Value, Inputs, Level 3 [Member]
Assets
Loans, fair value	939,868	935,414
Liabilities, fair value
Deposits, fair value	$ 455,141	$ 474,965