Shareholders' Equity - Preferred Stock, Cash Dividends and Stock Repurchase Program (Details) $ / shares in Units, $ in Thousands				3 Months Ended						12 Months Ended
	Jan. 27, 2016 $ / shares	Dec. 24, 2014 shares	Oct. 29, 2014 shares	Dec. 31, 2015 USD ($) $ / shares shares	Sep. 30, 2015 $ / shares	Jun. 30, 2015 USD ($) $ / shares	Mar. 31, 2015 $ / shares	Dec. 31, 2014 $ / shares shares	Sep. 30, 2014 $ / shares	Dec. 31, 2015 USD ($) series $ / shares shares	Dec. 31, 2014 $ / shares shares	Dec. 31, 2013 $ / shares	Jan. 06, 2016 USD ($)
Preferred Stock
Preferred stock, shares authorized | shares				5,000,000				5,000,000		5,000,000	5,000,000
Conversion price (in dollars per share) | $ / shares										$ 3.25
Value of contingent beneficial conversion feature to be recognized upon conversion | $				$ 168						$ 168
Cash dividend declared (in dollars per share) | $ / shares				$ 0.06	$ 0.06	$ 0.06	$ 0.05	$ 0.05	$ 0.03	$ 0.23	$ 0.08
Minimum
Preferred Stock
Number of series of preferred stock | series										1
Maximum
Preferred Stock
Preferred stock, shares authorized | shares				5,000,000						5,000,000
Series C preferred stock
Preferred Stock
Preferred stock conversion ratio			1							1
Value of contingent beneficial conversion feature to be recognized upon conversion | $				$ 70						$ 70
Cash dividend paid on preferred stock (in dollars per share) | $ / shares												$ 0
Conversion of Series C preferred stock (in shares) | shares		840,841	1,189,538							348,697
Preferred stock, shares issued | shares				0				348,697		0	348,697
Preferred stock, shares outstanding | shares				0				348,697		0	348,697
Common Stock
Preferred Stock
Cash dividend paid on preferred stock (in dollars per share) | $ / shares												0.7
Cash dividend paid on common stock (in dollars per share) | $ / shares										$ 0.23	$ 0.08	$ 0
Conversion of Series C preferred stock (in shares) | shares		840,841
Total shares repurchased | shares				55,428						55,428
Average price (in dollars per share) | $ / shares				$ 7.47						$ 7.47
Shares repurchased | shares										3,696
Average price per share stock repurchase | $ / shares										$ 7.52
Common Stock | Maximum
Preferred Stock
Repurchase of shares amount authorized | $						$ 5,000
Common Stock | Subsequent Event
Preferred Stock
Cash dividend declared (in dollars per share) | $ / shares	$ 0.06
Common Stock | Subsequent Event | Amended Plan
Preferred Stock
Repurchase of shares amount authorized | $													$ 5,000