Employee Benefits - Equity Incentive Plans (Details) $ in Thousands				3 Months Ended
	Jun. 30, 2010 shares	May. 18, 2007 shares	Jun. 21, 2006 shares	Mar. 31, 2016 USD ($) item shares	Mar. 31, 2015 USD ($) shares	Dec. 31, 2015 shares	Dec. 31, 2014 shares	Jul. 28, 2014 shares
Employee Benefits
Number of stock option plans frozen | item				3
Percentage of participant's contribution matched by Company				100.00%
Company contributions | $				$ 326	$ 243
Restricted Stock Units (RSUs)
Employee Benefits
Units outstanding				280,000
Total stock-based compensation expense | $				$ 212
Employee And Directors Time Based Options
Employee Benefits
Options outstanding						381,071
2014 Plan
Employee Benefits
Options outstanding				164,000		173,500
2014 Plan | Restricted Stock Units (RSUs)
Employee Benefits
Number of units granted				275,000
Units outstanding					292,500		292,500
2010 Option Plan | Employee And Directors Stock Options
Employee Benefits
Number of shares or units authorized for grants	2,239,906
Vesting period	4 years
2010 Option Plan | Employee And Directors Time Based Options
Employee Benefits
Options outstanding				380,902
2010 Option Plan | Employee And Directors Performance Options
Employee Benefits
Options outstanding				1,223,234
2006 Option Plan
Employee Benefits
Number of shares or units authorized for grants			450,000
Options outstanding						292,757
Vesting period			4 years
Term of awards			10 years
Redstone Option Plan
Employee Benefits
Options outstanding						234,573
SAR Plan
Employee Benefits
Number of shares or units authorized for grants		200,000
Units outstanding				93,000		103,000
Term of awards		10 years
Allocated share based compensation expense reversal | $				$ 22	$ 108
2014 Option Plan
Employee Benefits
Number of shares or units authorized for grants								1,273,838
Maximum
Employee Benefits
Percentage of participant's salary matched by Company				6.00%