Stock-Based Compensation (Details) $ / shares in Units, $ in Thousands		3 Months Ended
	Nov. 20, 2018 Officer	Mar. 31, 2019 USD ($) $ / shares shares	Mar. 31, 2018 USD ($)	May 02, 2016 shares
Stock-Based Compensation [Abstract]
Number of retiring officers receiving accelerated vesting period | Officer	1
LTIP [Member]
Stock-Based Compensation [Abstract]
Maximum number of shares of common stock that can be issued under the plan (in shares)				100,000
Term of plan		10 years
Maximum number of shares of common stock subject to awards that may be granted to a participant per calendar year (in shares)		2,000
LTIP [Member] | Restricted Stock [Member]
Number of Shares [Roll Forward]
Nonvested at beginning of the period (in shares)		3,080
Granted (in shares)		0
Vested (in shares)		(261)
Forfeited (in shares)		0
Nonvested at end of the period (in shares)		2,819
Grant Date Weighted Average Fair Value [Abstract]
Nonvested at beginning of the period (in dollars per share) | $ / shares		$ 33.85
Granted (in dollars per share) | $ / shares		0
Vested (in dollars per share) | $ / shares		33.99
Forfeited (in dollars per share) | $ / shares		0
Nonvested at end of the period (in dollars per share) | $ / shares		$ 33.84
Stock-Based Compensation Expense [Abstract]
Stock-based compensation expense | $		$ 14	$ 4
Recognized tax benefits related to stock-based compensation expense | $		4	$ 1
Fair value of vested shares | $		9
Stock-based compensation expense not yet recognized | $		$ 95
Period of recognition		3 years
LTIP [Member] | Restricted Stock [Member] | Officers and Key Employees [Member]
Stock-Based Compensation [Abstract]
Vesting period		3 years