Stock-Based Compensation (Details) - LTIP [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	May 02, 2016
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
Restricted Stock [Member]
Number of Shares [Roll Forward]
Nonvested at beginning of the period (in shares)		660
Granted (in shares)		1,505
Vested (in shares)		(711)
Forfeited (in shares)		0
Nonvested at end of the period (in shares)	1,454	1,454
Grant Date Weighted Average Fair Value [Abstract]
Nonvested at beginning of the period (in dollars per share)		$ 37.20
Granted (in dollars per share)		38.00
Vested (in dollars per share)		38.00
Forfeited (in dollars per share)		0
Nonvested at end of the period (in dollars per share)	$ 37.64	$ 37.64
Stock-Based Compensation Expense [Abstract]
Stock-based compensation expense	$ 32	$ 34
Recognized tax benefits related to stock-based compensation expense	13	14
Fair value of vested shares		27
Stock-based compensation expense not yet recognized	$ 47	$ 47
Period of recognition		3 years
Restricted Stock [Member] | Officers and Key Employees [Member]
Stock-Based Compensation [Abstract]
Vesting period		3 years