Stock-Based Compensation (Details 3) - Performance Shares [Member]	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Number of Units (in shares)
Outstanding and unvested, beginning of period | shares	52,476
Granted | shares	71,918
Vested | shares	0
Forfeited | shares	0
Outstanding and unvested, end of period | shares	124,394
Weighted average grant date fair value
Outstanding and unvested, beginning of period (in dollars per share) | $ / shares	$ 36.71
Granted (in dollars per share) | $ / shares	26.97
Vested (in dollars per share) | $ / shares	0.00
Forfeited (in dollars per share) | $ / shares	0.00
Outstanding and unvested, end of period (in dollars per share) | $ / shares	$ 31.08