Employee Benefit Plans (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, age of eligibility	21 years
Defined contribution plan, required service period prior to plan participation	0 years 0 months 90 days
Defined contribution plan, employer matching contribution (percent)	50.00%
Defined contribution plan, maximum annual contribution per employee (percent)	2.50%
Defined contribution plan, employer discretionary contribution amount	$ 933	$ 929	$ 820
Deferred compensation arrangement with individual, interest rate on notes payable	5.00%
Deferred compensation arrangement with individual, notes payable plus accrued interest	$ 169	$ 124
Minimum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred compensation arrangement with individual, minimum contractual term	5 years
Maximum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred compensation arrangement with individual, minimum contractual term	10 years