Stock-Based Compensation (Details 3) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Additional disclosures
Unrecognized stock-based compensation expense	$ 2,300,000
Weighted average period for recognizing unrecognized stock-based compensation expense	3 years
Stock options
Stock options
Outstanding at the beginning of the period (in shares)	70,339
Outstanding at the end of the period (in shares)	70,339	70,339
Expected to vest (in shares)	70,339
Weighted average exercise price
Outstanding at the beginning of the period (in dollars per share)	$ 54.15
Outstanding at the end of the period (in dollars per share)	$ 54.15	$ 54.15
Expected to vest (in dollars per share)	$ 54.15
Weighted average remaining contractual life
Outstanding at the beginning of the period	9 years 6 months 14 days	9 years 9 months 14 days
Outstanding at the end of the period	9 years 6 months 14 days	9 years 9 months 14 days
Expected to vest	9 years 6 months 14 days
Intrinsic Value
Outstanding at the beginning of the period	653,000
Outstanding at the end of the period	594,000	653,000
Expected to vest	594,000
Weighted-average assumptions used to calculate fair value of stock options granted
Dividend yield (as a percent)	0.00%
Volatility (as a percent)	35.00%
Risk-free interest rate (as a percent)	1.48%
Expected life	6 years 2 months 1 day
Weighted average fair value of options granted (in dollars per share)	$ 20.20
Additional disclosures
Unrecognized stock-based compensation expense	$ 1,200,000
Weighted average period for recognizing unrecognized stock-based compensation expense	3 years
Stock options | Minimum
Stock-based compensation
Vesting period	1 year
Stock options | Maximum
Stock-based compensation
Vesting period	4 years
Contractual life	10 years